31607313169 has 2 divisors, whose sum is σ = 31607313170. Its totient is φ = 31607313168.

The previous prime is 31607313167. The next prime is 31607313173. The reversal of 31607313169 is 96131370613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27187722769 + 4419590400 = 164887^2 + 66480^2 .

It is a cyclic number.

It is not a de Polignac number, because 31607313169 - 2¹ = 31607313167 is a prime.

It is a super-2 number, since 2×31607313169² (a number of 22 digits) contains 22 as substring.

Together with 31607313167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31607313163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15803656584 + 15803656585.

It is an arithmetic number, because the mean of its divisors is an integer number (15803656585).

Almost surely, 2^31607313169 is an apocalyptic number.

It is an amenable number.

31607313169 is a deficient number, since it is larger than the sum of its proper divisors (1).

31607313169 is an equidigital number, since it uses as much as digits as its factorization.

31607313169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 40.

The spelling of 31607313169 in words is "thirty-one billion, six hundred seven million, three hundred thirteen thousand, one hundred sixty-nine".