31090769 has 2 divisors, whose sum is σ = 31090770. Its totient is φ = 31090768.

The previous prime is 31090727. The next prime is 31090777. The reversal of 31090769 is 96709013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 2521744 = 5345^2 + 1588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31090769 is a prime.

It is a super-2 number, since 2×31090769² = 1933271834022722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31095769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15545384 + 15545385.

It is an arithmetic number, because the mean of its divisors is an integer number (15545385).

Almost surely, 2^31090769 is an apocalyptic number.

It is an amenable number.

31090769 is a deficient number, since it is larger than the sum of its proper divisors (1).

31090769 is an equidigital number, since it uses as much as digits as its factorization.

31090769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 31090769 is about 5575.9097015644. The cubic root of 31090769 is about 314.4443686075. Note that the first 3 decimals are identical.

The spelling of 31090769 in words is "thirty-one million, ninety thousand, seven hundred sixty-nine".