331659913 has 4 divisors (see below), whose sum is σ = 357172228. Its totient is φ = 306147600.

The previous prime is 331659907. The next prime is 331659929. The reversal of 331659913 is 319956133.

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 223562304 + 108097609 = 14952^2 + 10397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331659913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331659943) 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, 12756138 + ... + 12756163.

It is an arithmetic number, because the mean of its divisors is an integer number (89293057).

Almost surely, 2^331659913 is an apocalyptic number.

It is an amenable number.

331659913 is a deficient number, since it is larger than the sum of its proper divisors (25512315).

331659913 is a wasteful number, since it uses less digits than its factorization.

331659913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25512314.

The product of its digits is 65610, while the sum is 40.

The square root of 331659913 is about 18211.5324176742. The cubic root of 331659913 is about 692.1990424180.

The spelling of 331659913 in words is "three hundred thirty-one million, six hundred fifty-nine thousand, nine hundred thirteen".