312693842779 has 2 divisors, whose sum is σ = 312693842780. Its totient is φ = 312693842778.

The previous prime is 312693842777. The next prime is 312693842809. The reversal of 312693842779 is 977248396213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312693842779 - 2¹ = 312693842777 is a prime.

Together with 312693842777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312693842777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156346921389 + 156346921390.

It is an arithmetic number, because the mean of its divisors is an integer number (156346921390).

Almost surely, 2^312693842779 is an apocalyptic number.

312693842779 is a deficient number, since it is larger than the sum of its proper divisors (1).

312693842779 is an equidigital number, since it uses as much as digits as its factorization.

312693842779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 61.

The spelling of 312693842779 in words is "three hundred twelve billion, six hundred ninety-three million, eight hundred forty-two thousand, seven hundred seventy-nine".