312320012987 has 2 divisors, whose sum is σ = 312320012988. Its totient is φ = 312320012986.

The previous prime is 312320012959. The next prime is 312320013101. The reversal of 312320012987 is 789210023213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312320012987 - 2⁸ = 312320012731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312320012987.

It is not a weakly prime, because it can be changed into another prime (312320012387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156160006493 + 156160006494.

It is an arithmetic number, because the mean of its divisors is an integer number (156160006494).

Almost surely, 2^312320012987 is an apocalyptic number.

312320012987 is a deficient number, since it is larger than the sum of its proper divisors (1).

312320012987 is an equidigital number, since it uses as much as digits as its factorization.

312320012987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 312320012987 in words is "three hundred twelve billion, three hundred twenty million, twelve thousand, nine hundred eighty-seven".