331888097 has 4 divisors (see below), whose sum is σ = 333337620. Its totient is φ = 330438576.

The previous prime is 331888087. The next prime is 331888169. The reversal of 331888097 is 790888133.

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

It can be written as a sum of positive squares in 2 ways, for example, as 320266816 + 11621281 = 17896^2 + 3409^2 .

It is a cyclic number.

It is not a de Polignac number, because 331888097 - 2⁸ = 331887841 is a prime.

It is a super-2 number, since 2×331888097² = 220299417860562818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331888057) 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, 724418 + ... + 724875.

It is an arithmetic number, because the mean of its divisors is an integer number (83334405).

Almost surely, 2^331888097 is an apocalyptic number.

It is an amenable number.

331888097 is a deficient number, since it is larger than the sum of its proper divisors (1449523).

331888097 is a wasteful number, since it uses less digits than its factorization.

331888097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449522.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 331888097 is about 18217.7961619950. The cubic root of 331888097 is about 692.3577517170.

The spelling of 331888097 in words is "three hundred thirty-one million, eight hundred eighty-eight thousand, ninety-seven".