312239488861 has 2 divisors, whose sum is σ = 312239488862. Its totient is φ = 312239488860.

The previous prime is 312239488843. The next prime is 312239488877. The reversal of 312239488861 is 168884932213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242856768025 + 69382720836 = 492805^2 + 263406^2 .

It is a cyclic number.

It is not a de Polignac number, because 312239488861 - 2⁵ = 312239488829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312239488831) 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, 156119744430 + 156119744431.

It is an arithmetic number, because the mean of its divisors is an integer number (156119744431).

Almost surely, 2^312239488861 is an apocalyptic number.

It is an amenable number.

312239488861 is a deficient number, since it is larger than the sum of its proper divisors (1).

312239488861 is an equidigital number, since it uses as much as digits as its factorization.

312239488861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3981312, while the sum is 55.

The spelling of 312239488861 in words is "three hundred twelve billion, two hundred thirty-nine million, four hundred eighty-eight thousand, eight hundred sixty-one".