312670988517893 has 2 divisors, whose sum is σ = 312670988517894. Its totient is φ = 312670988517892.

The previous prime is 312670988517883. The next prime is 312670988517931. The reversal of 312670988517893 is 398715889076213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279865563847489 + 32805424670404 = 16729183^2 + 5727602^2 .

It is an emirp because it is prime and its reverse (398715889076213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312670988517893 - 2¹² = 312670988513797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312670988517883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156335494258946 + 156335494258947.

It is an arithmetic number, because the mean of its divisors is an integer number (156335494258947).

Almost surely, 2^{312670988517893} is an apocalyptic number.

It is an amenable number.

312670988517893 is a deficient number, since it is larger than the sum of its proper divisors (1).

312670988517893 is an equidigital number, since it uses as much as digits as its factorization.

312670988517893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1097349120, while the sum is 77.

The spelling of 312670988517893 in words is "three hundred twelve trillion, six hundred seventy billion, nine hundred eighty-eight million, five hundred seventeen thousand, eight hundred ninety-three".