31607388413 has 2 divisors, whose sum is σ = 31607388414. Its totient is φ = 31607388412.

The previous prime is 31607388409. The next prime is 31607388437. The reversal of 31607388413 is 31488370613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25032935524 + 6574452889 = 158218^2 + 81083^2 .

It is a cyclic number.

It is not a de Polignac number, because 31607388413 - 2² = 31607388409 is a prime.

It is a super-3 number, since 3×31607388413³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31607388443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15803694206 + 15803694207.

It is an arithmetic number, because the mean of its divisors is an integer number (15803694207).

Almost surely, 2^31607388413 is an apocalyptic number.

It is an amenable number.

31607388413 is a deficient number, since it is larger than the sum of its proper divisors (1).

31607388413 is an equidigital number, since it uses as much as digits as its factorization.

31607388413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 31607388413 in words is "thirty-one billion, six hundred seven million, three hundred eighty-eight thousand, four hundred thirteen".