897694731 has 12 divisors (see below), whose sum is σ = 1344695352. Its totient is φ = 598462992.

The previous prime is 897694687. The next prime is 897694747. The reversal of 897694731 is 137496798.

It is a happy number.

It is not a de Polignac number, because 897694731 - 2¹¹ = 897692683 is a prime.

It is a super-2 number, since 2×897694731² = 1611711660130324722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (897694781) 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, 1846866 + ... + 1847351.

It is an arithmetic number, because the mean of its divisors is an integer number (112057946).

Almost surely, 2^897694731 is an apocalyptic number.

897694731 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

897694731 is a deficient number, since it is larger than the sum of its proper divisors (447000621).

897694731 is an equidigital number, since it uses as much as digits as its factorization.

897694731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694232 (or 3694220 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 897694731 is about 29961.5542153607. The cubic root of 897694731 is about 964.6643417249.

The spelling of 897694731 in words is "eight hundred ninety-seven million, six hundred ninety-four thousand, seven hundred thirty-one".