31163969 has 2 divisors, whose sum is σ = 31163970. Its totient is φ = 31163968.

The previous prime is 31163921. The next prime is 31164017. The reversal of 31163969 is 96936113.

It is a balanced prime because it is at equal distance from previous prime (31163921) and next prime (31164017).

It can be written as a sum of positive squares in only one way, i.e., 29376400 + 1787569 = 5420^2 + 1337^2 .

It is a cyclic number.

It is not a de Polignac number, because 31163969 - 2¹² = 31159873 is a prime.

It is a super-2 number, since 2×31163969² = 1942385927665922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31162969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15581984 + 15581985.

It is an arithmetic number, because the mean of its divisors is an integer number (15581985).

Almost surely, 2^31163969 is an apocalyptic number.

It is an amenable number.

31163969 is a deficient number, since it is larger than the sum of its proper divisors (1).

31163969 is an equidigital number, since it uses as much as digits as its factorization.

31163969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 38.

The square root of 31163969 is about 5582.4697939174. The cubic root of 31163969 is about 314.6909507726.

The spelling of 31163969 in words is "thirty-one million, one hundred sixty-three thousand, nine hundred sixty-nine".