31375697 has 2 divisors, whose sum is σ = 31375698. Its totient is φ = 31375696.

The previous prime is 31375661. The next prime is 31375739. The reversal of 31375697 is 79657313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31348801 + 26896 = 5599^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 31375697 - 2⁶ = 31375633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31375607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15687848 + 15687849.

It is an arithmetic number, because the mean of its divisors is an integer number (15687849).

Almost surely, 2^31375697 is an apocalyptic number.

It is an amenable number.

31375697 is a deficient number, since it is larger than the sum of its proper divisors (1).

31375697 is an equidigital number, since it uses as much as digits as its factorization.

31375697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 41.

The square root of 31375697 is about 5601.4013425214. The cubic root of 31375697 is about 315.4020129651.

The spelling of 31375697 in words is "thirty-one million, three hundred seventy-five thousand, six hundred ninety-seven".