31402990979 has 8 divisors (see below), whose sum is σ = 32718947328. Its totient is φ = 30105969480.

The previous prime is 31402990973. The next prime is 31402991017. The reversal of 31402990979 is 97909920413.

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

It is a cyclic number.

It is not a de Polignac number, because 31402990979 - 2¹² = 31402986883 is a prime.

It is a super-2 number, since 2×31402990979² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31402990979.

It is not an unprimeable number, because it can be changed into a prime (31402990973) 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, 4730327 + ... + 4736960.

It is an arithmetic number, because the mean of its divisors is an integer number (4089868416).

Almost surely, 2^31402990979 is an apocalyptic number.

31402990979 is a deficient number, since it is larger than the sum of its proper divisors (1315956349).

31402990979 is a wasteful number, since it uses less digits than its factorization.

31402990979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467425.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 31402990979 in words is "thirty-one billion, four hundred two million, nine hundred ninety thousand, nine hundred seventy-nine".