312940057 has 2 divisors, whose sum is σ = 312940058. Its totient is φ = 312940056.

The previous prime is 312940021. The next prime is 312940079. The reversal of 312940057 is 750049213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312193561 + 746496 = 17669^2 + 864^2 .

It is an emirp because it is prime and its reverse (750049213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312940057 - 2⁷ = 312939929 is a prime.

It is not a weakly prime, because it can be changed into another prime (312940457) 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, 156470028 + 156470029.

It is an arithmetic number, because the mean of its divisors is an integer number (156470029).

Almost surely, 2^312940057 is an apocalyptic number.

It is an amenable number.

312940057 is a deficient number, since it is larger than the sum of its proper divisors (1).

312940057 is an equidigital number, since it uses as much as digits as its factorization.

312940057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 312940057 is about 17690.1118424955. Note that the first 3 decimals coincide. The cubic root of 312940057 is about 678.9227876743.

The spelling of 312940057 in words is "three hundred twelve million, nine hundred forty thousand, fifty-seven".