31368793 has 2 divisors, whose sum is σ = 31368794. Its totient is φ = 31368792.

The previous prime is 31368781. The next prime is 31368811. The reversal of 31368793 is 39786313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25836889 + 5531904 = 5083^2 + 2352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31368793 is a prime.

It is not a weakly prime, because it can be changed into another prime (31368703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15684396 + 15684397.

It is an arithmetic number, because the mean of its divisors is an integer number (15684397).

Almost surely, 2^31368793 is an apocalyptic number.

It is an amenable number.

31368793 is a deficient number, since it is larger than the sum of its proper divisors (1).

31368793 is an equidigital number, since it uses as much as digits as its factorization.

31368793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 31368793 is about 5600.7850342608. The cubic root of 31368793 is about 315.3788772748.

The spelling of 31368793 in words is "thirty-one million, three hundred sixty-eight thousand, seven hundred ninety-three".