897995691 has 12 divisors (see below), whose sum is σ = 1297364640. Its totient is φ = 598543920.

The previous prime is 897995687. The next prime is 897995711. The reversal of 897995691 is 196599798.

It is not a de Polignac number, because 897995691 - 2² = 897995687 is a prime.

It is a super-2 number, since 2×897995691² = 1612792522109134962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (897995491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83481 + ... + 93621.

It is an arithmetic number, because the mean of its divisors is an integer number (108113720).

Almost surely, 2^897995691 is an apocalyptic number.

897995691 is a deficient number, since it is larger than the sum of its proper divisors (399368949).

897995691 is a wasteful number, since it uses less digits than its factorization.

897995691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19986 (or 19983 counting only the distinct ones).

The product of its digits is 11022480, while the sum is 63.

The square root of 897995691 is about 29966.5762308609. The cubic root of 897995691 is about 964.7721337287.

The spelling of 897995691 in words is "eight hundred ninety-seven million, nine hundred ninety-five thousand, six hundred ninety-one".