Stylized Numeral App Icon with 3D Gradient and Particle Burst AI Image Prompt

Create a polished mobile app icon featuring a single large stylized numeral {argument name="number" default="9"} centered slightly left on a square canvas with very rounded corners. Use a deep midnight navy-to-purple background with subtle radial shading and a faint vignette. The numeral should be thick, smooth, glossy, and dimensional, like a custom sans-serif 3D glyph, with a luminous gradient running from golden yellow and orange at the upper left through hot pink in the middle to vivid violet and electric purple at the lower tip. Add a soft neon rim light and inner glow around the digit, with a stronger warm glow on the top-left edge and magenta-purple glow on the bottom curve. The right side of the numeral dissolves into a dynamic particle burst: dozens of circular dots and small speckles of varied sizes scattering outward to the right, colored orange, red, pink, magenta, and purple, densest near the digit and fading into the dark background. Keep the composition clean and iconic, with no text other than the numeral, no border, no watermark, high contrast, modern iOS-style app icon, crisp edges, vibrant gradient lighting, and a premium digital-art finish.