921204972 has 36 divisors (see below), whose sum is σ = 2339064000. Its totient is φ = 305688672.

The previous prime is 921204943. The next prime is 921204983. The reversal of 921204972 is 279402129.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 49347 + ... + 65402.

It is an arithmetic number, because the mean of its divisors is an integer number (64974000).

Almost surely, 2^921204972 is an apocalyptic number.

It is an amenable number.

921204972 is an abundant number, since it is smaller than the sum of its proper divisors (1417859028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921204972 is a wasteful number, since it uses less digits than its factorization.

921204972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114982 (or 114977 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 921204972 is about 30351.3586516321. The cubic root of 921204972 is about 973.0132577492.

The spelling of 921204972 in words is "nine hundred twenty-one million, two hundred four thousand, nine hundred seventy-two".