31368697 has 2 divisors, whose sum is σ = 31368698. Its totient is φ = 31368696.

The previous prime is 31368661. The next prime is 31368703. The reversal of 31368697 is 79686313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25361296 + 6007401 = 5036^2 + 2451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31368697 is a prime.

It is not a weakly prime, because it can be changed into another prime (31368647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15684348 + 15684349.

It is an arithmetic number, because the mean of its divisors is an integer number (15684349).

Almost surely, 2^31368697 is an apocalyptic number.

It is an amenable number.

31368697 is a deficient number, since it is larger than the sum of its proper divisors (1).

31368697 is an equidigital number, since it uses as much as digits as its factorization.

31368697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 31368697 is about 5600.7764640271. The cubic root of 31368697 is about 315.3785555495.

The spelling of 31368697 in words is "thirty-one million, three hundred sixty-eight thousand, six hundred ninety-seven".