31679880319 has 2 divisors, whose sum is σ = 31679880320. Its totient is φ = 31679880318.

The previous prime is 31679880317. The next prime is 31679880377. The reversal of 31679880319 is 91308897613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31679880319 - 2¹ = 31679880317 is a prime.

It is a super-2 number, since 2×31679880319² (a number of 22 digits) contains 22 as substring.

Together with 31679880317, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31679880319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31679880311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15839940159 + 15839940160.

It is an arithmetic number, because the mean of its divisors is an integer number (15839940160).

Almost surely, 2^31679880319 is an apocalyptic number.

31679880319 is a deficient number, since it is larger than the sum of its proper divisors (1).

31679880319 is an equidigital number, since it uses as much as digits as its factorization.

31679880319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 31679880319 in words is "thirty-one billion, six hundred seventy-nine million, eight hundred eighty thousand, three hundred nineteen".