31112034397 has 2 divisors, whose sum is σ = 31112034398. Its totient is φ = 31112034396.

The previous prime is 31112034389. The next prime is 31112034463. The reversal of 31112034397 is 79343021113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31092621561 + 19412836 = 176331^2 + 4406^2 .

It is an emirp because it is prime and its reverse (79343021113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31112034397 - 2³ = 31112034389 is a prime.

It is a super-2 number, since 2×31112034397² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31112034337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556017198 + 15556017199.

It is an arithmetic number, because the mean of its divisors is an integer number (15556017199).

Almost surely, 2^31112034397 is an apocalyptic number.

It is an amenable number.

31112034397 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112034397 is an equidigital number, since it uses as much as digits as its factorization.

31112034397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 31112034397 in words is "thirty-one billion, one hundred twelve million, thirty-four thousand, three hundred ninety-seven".