897564906 has 48 divisors (see below), whose sum is σ = 2299190400. Its totient is φ = 247603104.

The previous prime is 897564901. The next prime is 897564923. The reversal of 897564906 is 609465798.

897564906 is a `hidden beast` number, since 89 + 75 + 6 + 490 + 6 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (897564901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119166 + ... + 126473.

It is an arithmetic number, because the mean of its divisors is an integer number (47899800).

Almost surely, 2^897564906 is an apocalyptic number.

897564906 is an abundant number, since it is smaller than the sum of its proper divisors (1401625494).

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

897564906 is a wasteful number, since it uses less digits than its factorization.

897564906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245683 (or 245680 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 897564906 is about 29959.3876105637. The cubic root of 897564906 is about 964.6178360916.

It can be divided in two parts, 897564 and 906, that added together give a triangular number (898470 = T₁₃₄₀).

The spelling of 897564906 in words is "eight hundred ninety-seven million, five hundred sixty-four thousand, nine hundred six".