31113508969 has 2 divisors, whose sum is σ = 31113508970. Its totient is φ = 31113508968.

The previous prime is 31113508927. The next prime is 31113508973. The reversal of 31113508969 is 96980531113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23225760000 + 7887748969 = 152400^2 + 88813^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113508969 - 2⁷ = 31113508841 is a prime.

It is a super-2 number, since 2×31113508969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31113508999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556754484 + 15556754485.

It is an arithmetic number, because the mean of its divisors is an integer number (15556754485).

Almost surely, 2^31113508969 is an apocalyptic number.

It is an amenable number.

31113508969 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113508969 is an equidigital number, since it uses as much as digits as its factorization.

31113508969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 31113508969 in words is "thirty-one billion, one hundred thirteen million, five hundred eight thousand, nine hundred sixty-nine".