31610278979 has 2 divisors, whose sum is σ = 31610278980. Its totient is φ = 31610278978.

The previous prime is 31610278963. The next prime is 31610279021. The reversal of 31610278979 is 97987201613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31610278979 - 2⁴ = 31610278963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31610278979.

It is not a weakly prime, because it can be changed into another prime (31610278939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15805139489 + 15805139490.

It is an arithmetic number, because the mean of its divisors is an integer number (15805139490).

Almost surely, 2^31610278979 is an apocalyptic number.

31610278979 is a deficient number, since it is larger than the sum of its proper divisors (1).

31610278979 is an equidigital number, since it uses as much as digits as its factorization.

31610278979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 31610278979 in words is "thirty-one billion, six hundred ten million, two hundred seventy-eight thousand, nine hundred seventy-nine".