312993893 has 2 divisors, whose sum is σ = 312993894. Its totient is φ = 312993892.

The previous prime is 312993881. The next prime is 312994007. The reversal of 312993893 is 398399213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213832129 + 99161764 = 14623^2 + 9958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312993893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312993823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156496946 + 156496947.

It is an arithmetic number, because the mean of its divisors is an integer number (156496947).

Almost surely, 2^312993893 is an apocalyptic number.

It is an amenable number.

312993893 is a deficient number, since it is larger than the sum of its proper divisors (1).

312993893 is an equidigital number, since it uses as much as digits as its factorization.

312993893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 47.

The square root of 312993893 is about 17691.6334180878. The cubic root of 312993893 is about 678.9617178044.

The spelling of 312993893 in words is "three hundred twelve million, nine hundred ninety-three thousand, eight hundred ninety-three".