921904725 has 24 divisors (see below), whose sum is σ = 1741961920. Its totient is φ = 421441920.

The previous prime is 921904703. The next prime is 921904759. The reversal of 921904725 is 527409129.

It is not a de Polignac number, because 921904725 - 2⁷ = 921904597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 877480 + ... + 878529.

Almost surely, 2^921904725 is an apocalyptic number.

It is an amenable number.

921904725 is a deficient number, since it is larger than the sum of its proper divisors (820057195).

921904725 is a wasteful number, since it uses less digits than its factorization.

921904725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756029 (or 1756024 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 921904725 is about 30362.8840033354. The cubic root of 921904725 is about 973.2595643593.

The spelling of 921904725 in words is "nine hundred twenty-one million, nine hundred four thousand, seven hundred twenty-five".