312246642209 has 2 divisors, whose sum is σ = 312246642210. Its totient is φ = 312246642208.

The previous prime is 312246642167. The next prime is 312246642229. The reversal of 312246642209 is 902246642213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267966699025 + 44279943184 = 517655^2 + 210428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312246642209 is a prime.

It is not a weakly prime, because it can be changed into another prime (312246642229) 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, 156123321104 + 156123321105.

It is an arithmetic number, because the mean of its divisors is an integer number (156123321105).

Almost surely, 2^312246642209 is an apocalyptic number.

It is an amenable number.

312246642209 is a deficient number, since it is larger than the sum of its proper divisors (1).

312246642209 is an equidigital number, since it uses as much as digits as its factorization.

312246642209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 312246642209 in words is "three hundred twelve billion, two hundred forty-six million, six hundred forty-two thousand, two hundred nine".