897931 has 2 divisors, whose sum is σ = 897932. Its totient is φ = 897930.

The previous prime is 897907. The next prime is 897947. The reversal of 897931 is 139798.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 897931 - 2⁵ = 897899 is a prime.

It is a super-2 number, since 2×897931² = 1612560161522, which contains 22 as substring.

It is a Chen prime.

897931 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (897971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448965 + 448966.

It is an arithmetic number, because the mean of its divisors is an integer number (448966).

2⁸⁹⁷⁹³¹ is an apocalyptic number.

897931 is a deficient number, since it is larger than the sum of its proper divisors (1).

897931 is an equidigital number, since it uses as much as digits as its factorization.

897931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 897931 is about 947.5922118718. The cubic root of 897931 is about 96.4748965996.

The spelling of 897931 in words is "eight hundred ninety-seven thousand, nine hundred thirty-one".