897564901 has 2 divisors, whose sum is σ = 897564902. Its totient is φ = 897564900.

The previous prime is 897564869. The next prime is 897564923. The reversal of 897564901 is 109465798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499522500 + 398042401 = 22350^2 + 19951^2 .

It is a cyclic number.

It is not a de Polignac number, because 897564901 - 2⁵ = 897564869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897574901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448782450 + 448782451.

It is an arithmetic number, because the mean of its divisors is an integer number (448782451).

Almost surely, 2^897564901 is an apocalyptic number.

It is an amenable number.

897564901 is a deficient number, since it is larger than the sum of its proper divisors (1).

897564901 is an equidigital number, since it uses as much as digits as its factorization.

897564901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 897564901 is about 29959.3875271174. The cubic root of 897564901 is about 964.6178343004.

The spelling of 897564901 in words is "eight hundred ninety-seven million, five hundred sixty-four thousand, nine hundred one".