331694497 has 4 divisors (see below), whose sum is σ = 351205956. Its totient is φ = 312183040.

The previous prime is 331694491. The next prime is 331694527. The reversal of 331694497 is 794496133.

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 116661601 + 215032896 = 10801^2 + 14664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331694497 is a prime.

It is a super-2 number, since 2×331694497² = 220042478680166018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331694491) 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, 9755704 + ... + 9755737.

It is an arithmetic number, because the mean of its divisors is an integer number (87801489).

Almost surely, 2^331694497 is an apocalyptic number.

It is an amenable number.

331694497 is a deficient number, since it is larger than the sum of its proper divisors (19511459).

331694497 is a wasteful number, since it uses less digits than its factorization.

331694497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19511458.

The product of its digits is 489888, while the sum is 46.

The square root of 331694497 is about 18212.4819011578. The cubic root of 331694497 is about 692.2231013799.

The spelling of 331694497 in words is "three hundred thirty-one million, six hundred ninety-four thousand, four hundred ninety-seven".