312043817 has 2 divisors, whose sum is σ = 312043818. Its totient is φ = 312043816.

The previous prime is 312043813. The next prime is 312043847. The reversal of 312043817 is 718340213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218418841 + 93624976 = 14779^2 + 9676^2 .

It is a cyclic number.

It is not a de Polignac number, because 312043817 - 2² = 312043813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312043817.

It is not a weakly prime, because it can be changed into another prime (312043811) 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, 156021908 + 156021909.

It is an arithmetic number, because the mean of its divisors is an integer number (156021909).

Almost surely, 2^312043817 is an apocalyptic number.

It is an amenable number.

312043817 is a deficient number, since it is larger than the sum of its proper divisors (1).

312043817 is an equidigital number, since it uses as much as digits as its factorization.

312043817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 312043817 is about 17664.7620136814. The cubic root of 312043817 is about 678.2740376961.

The spelling of 312043817 in words is "three hundred twelve million, forty-three thousand, eight hundred seventeen".