331964809 has 8 divisors (see below), whose sum is σ = 362358720. Its totient is φ = 301606800.

The previous prime is 331964791. The next prime is 331964813. The reversal of 331964809 is 908469133.

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

It is a de Polignac number, because none of the positive numbers 2^k-331964809 is a prime.

It is a super-2 number, since 2×331964809² = 220401268828812962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331964869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12639 + ... + 28699.

It is an arithmetic number, because the mean of its divisors is an integer number (45294840).

Almost surely, 2^331964809 is an apocalyptic number.

It is an amenable number.

331964809 is a deficient number, since it is larger than the sum of its proper divisors (30393911).

331964809 is a wasteful number, since it uses less digits than its factorization.

331964809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17951.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 331964809 is about 18219.9014541792. The cubic root of 331964809 is about 692.4110910371.

The spelling of 331964809 in words is "three hundred thirty-one million, nine hundred sixty-four thousand, eight hundred nine".