331996697 has 6 divisors (see below), whose sum is σ = 347059482. Its totient is φ = 317561552.

The previous prime is 331996667. The next prime is 331996699. The reversal of 331996697 is 796699133.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 182277001 + 149719696 = 13501^2 + 12236^2 .

It is not a de Polignac number, because 331996697 - 2¹⁸ = 331734553 is a prime.

It is a super-2 number, since 2×331996697² = 220443613637819618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331996699) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 313268 + ... + 314325.

It is an arithmetic number, because the mean of its divisors is an integer number (57843247).

Almost surely, 2^331996697 is an apocalyptic number.

It is an amenable number.

331996697 is a deficient number, since it is larger than the sum of its proper divisors (15062785).

331996697 is an equidigital number, since it uses as much as digits as its factorization.

331996697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627639 (or 627616 counting only the distinct ones).

The product of its digits is 1653372, while the sum is 53.

The square root of 331996697 is about 18220.7765202255. The cubic root of 331996697 is about 692.4332609552.

The spelling of 331996697 in words is "three hundred thirty-one million, nine hundred ninety-six thousand, six hundred ninety-seven".