31612969 has 2 divisors, whose sum is σ = 31612970. Its totient is φ = 31612968.

The previous prime is 31612961. The next prime is 31612981. The reversal of 31612969 is 96921613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17264025 + 14348944 = 4155^2 + 3788^2 .

It is a cyclic number.

It is not a de Polignac number, because 31612969 - 2³ = 31612961 is a prime.

It is a super-2 number, since 2×31612969² = 1998759617989922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31612961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15806484 + 15806485.

It is an arithmetic number, because the mean of its divisors is an integer number (15806485).

Almost surely, 2^31612969 is an apocalyptic number.

It is an amenable number.

31612969 is a deficient number, since it is larger than the sum of its proper divisors (1).

31612969 is an equidigital number, since it uses as much as digits as its factorization.

31612969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 31612969 is about 5622.5411514723. The cubic root of 31612969 is about 316.1950706309.

The spelling of 31612969 in words is "thirty-one million, six hundred twelve thousand, nine hundred sixty-nine".