897972906 has 32 divisors (see below), whose sum is σ = 1851779520. Its totient is φ = 290082816.

The previous prime is 897972893. The next prime is 897972917. The reversal of 897972906 is 609279798.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 49185 + ... + 64923.

It is an arithmetic number, because the mean of its divisors is an integer number (57868110).

Almost surely, 2^897972906 is an apocalyptic number.

897972906 is an abundant number, since it is smaller than the sum of its proper divisors (953806614).

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

897972906 is a wasteful number, since it uses less digits than its factorization.

897972906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16038.

The product of its (nonzero) digits is 3429216, while the sum is 57.

The square root of 897972906 is about 29966.1960548882. The cubic root of 897972906 is about 964.7639738830.

The spelling of 897972906 in words is "eight hundred ninety-seven million, nine hundred seventy-two thousand, nine hundred six".