921690052 has 24 divisors (see below), whose sum is σ = 1635137280. Its totient is φ = 454534080.

The previous prime is 921690031. The next prime is 921690061. The reversal of 921690052 is 250096129.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150433 + ... + 156439.

It is an arithmetic number, because the mean of its divisors is an integer number (68130720).

Almost surely, 2^921690052 is an apocalyptic number.

It is an amenable number.

921690052 is a deficient number, since it is larger than the sum of its proper divisors (713447228).

921690052 is a wasteful number, since it uses less digits than its factorization.

921690052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6531 (or 6529 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 921690052 is about 30359.3486754904. The cubic root of 921690052 is about 973.1840146977.

The spelling of 921690052 in words is "nine hundred twenty-one million, six hundred ninety thousand, fifty-two".