897946831 has 4 divisors (see below), whose sum is σ = 901120072. Its totient is φ = 894773592.

The previous prime is 897946823. The next prime is 897946853. The reversal of 897946831 is 138649798.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 897946831 - 2³ = 897946823 is a prime.

It is a super-2 number, since 2×897946831² = 1612617022605885122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897946531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1586196 + ... + 1586761.

It is an arithmetic number, because the mean of its divisors is an integer number (225280018).

Almost surely, 2^897946831 is an apocalyptic number.

897946831 is a deficient number, since it is larger than the sum of its proper divisors (3173241).

897946831 is a wasteful number, since it uses less digits than its factorization.

897946831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173240.

The product of its digits is 2612736, while the sum is 55.

The square root of 897946831 is about 29965.7609781564. The cubic root of 897946831 is about 964.7546356413.

The spelling of 897946831 in words is "eight hundred ninety-seven million, nine hundred forty-six thousand, eight hundred thirty-one".