331693917 has 8 divisors (see below), whose sum is σ = 442470240. Its totient is φ = 221023440.

The previous prime is 331693889. The next prime is 331693931. The reversal of 331693917 is 719396133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331693917 - 2¹⁵ = 331661149 is a prime.

It is a super-2 number, since 2×331693917² = 220041709149605778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331693997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18834 + ... + 31907.

It is an arithmetic number, because the mean of its divisors is an integer number (55308780).

Almost surely, 2^331693917 is an apocalyptic number.

It is an amenable number.

331693917 is a deficient number, since it is larger than the sum of its proper divisors (110776323).

331693917 is a wasteful number, since it uses less digits than its factorization.

331693917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52923.

The product of its digits is 91854, while the sum is 42.

The square root of 331693917 is about 18212.4659780053. The cubic root of 331693917 is about 692.2226979066. Note that the first 3 decimals are identical.

The spelling of 331693917 in words is "three hundred thirty-one million, six hundred ninety-three thousand, nine hundred seventeen".