390472903 has 4 divisors (see below), whose sum is σ = 390777120. Its totient is φ = 390168688.

The previous prime is 390472891. The next prime is 390472913. The reversal of 390472903 is 309274093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309274093 = 109 ⋅2837377.

It is a cyclic number.

It is not a de Polignac number, because 390472903 - 2⁹ = 390472391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390472913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150175 + ... + 152752.

It is an arithmetic number, because the mean of its divisors is an integer number (97694280).

Almost surely, 2^390472903 is an apocalyptic number.

390472903 is a deficient number, since it is larger than the sum of its proper divisors (304217).

390472903 is a wasteful number, since it uses less digits than its factorization.

390472903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304216.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 390472903 is about 19760.3872178659. The cubic root of 390472903 is about 730.9095455804.

The spelling of 390472903 in words is "three hundred ninety million, four hundred seventy-two thousand, nine hundred three".