31604429979 has 12 divisors (see below), whose sum is σ = 45653088000. Its totient is φ = 21068583984.

The previous prime is 31604429977. The next prime is 31604430017. The reversal of 31604429979 is 97992440613.

31604429979 is a `hidden beast` number, since 3 + 1 + 604 + 4 + 29 + 9 + 7 + 9 = 666.

It is not a de Polignac number, because 31604429979 - 2¹ = 31604429977 is a prime.

It is a super-3 number, since 3×31604429979³ (a number of 32 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (31604429977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137382 + ... + 286500.

It is an arithmetic number, because the mean of its divisors is an integer number (3804424000).

Almost surely, 2^31604429979 is an apocalyptic number.

31604429979 is a deficient number, since it is larger than the sum of its proper divisors (14048658021).

31604429979 is a wasteful number, since it uses less digits than its factorization.

31604429979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172674 (or 172671 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 31604429979 in words is "thirty-one billion, six hundred four million, four hundred twenty-nine thousand, nine hundred seventy-nine".