331404979 has 4 divisors (see below), whose sum is σ = 333934920. Its totient is φ = 328875040.

The previous prime is 331404959. The next prime is 331404989. The reversal of 331404979 is 979404133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979404133 = 839 ⋅1167347.

It is a cyclic number.

It is not a de Polignac number, because 331404979 - 2¹¹ = 331402931 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331404949) 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, 1264774 + ... + 1265035.

It is an arithmetic number, because the mean of its divisors is an integer number (83483730).

Almost surely, 2^331404979 is an apocalyptic number.

331404979 is a deficient number, since it is larger than the sum of its proper divisors (2529941).

331404979 is a wasteful number, since it uses less digits than its factorization.

331404979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529940.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 331404979 is about 18204.5318258943. The cubic root of 331404979 is about 692.0216415153.

The spelling of 331404979 in words is "three hundred thirty-one million, four hundred four thousand, nine hundred seventy-nine".