31930057 has 2 divisors, whose sum is σ = 31930058. Its totient is φ = 31930056.

The previous prime is 31929991. The next prime is 31930081. The reversal of 31930057 is 75003913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24000201 + 7929856 = 4899^2 + 2816^2 .

It is a cyclic number.

It is not a de Polignac number, because 31930057 - 2¹¹ = 31928009 is a prime.

It is not a weakly prime, because it can be changed into another prime (31930357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15965028 + 15965029.

It is an arithmetic number, because the mean of its divisors is an integer number (15965029).

Almost surely, 2^31930057 is an apocalyptic number.

It is an amenable number.

31930057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31930057 is an equidigital number, since it uses as much as digits as its factorization.

31930057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 31930057 is about 5650.6687214877. The cubic root of 31930057 is about 317.2487341815.

The spelling of 31930057 in words is "thirty-one million, nine hundred thirty thousand, fifty-seven".