31397083 has 2 divisors, whose sum is σ = 31397084. Its totient is φ = 31397082.

The previous prime is 31397077. The next prime is 31397129. The reversal of 31397083 is 38079313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31397083 is a prime.

It is not a weakly prime, because it can be changed into another prime (31397183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15698541 + 15698542.

It is an arithmetic number, because the mean of its divisors is an integer number (15698542).

Almost surely, 2^31397083 is an apocalyptic number.

31397083 is a deficient number, since it is larger than the sum of its proper divisors (1).

31397083 is an equidigital number, since it uses as much as digits as its factorization.

31397083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 31397083 is about 5603.3100039173. The cubic root of 31397083 is about 315.4736571159.

The spelling of 31397083 in words is "thirty-one million, three hundred ninety-seven thousand, eighty-three".