312400428391 has 2 divisors, whose sum is σ = 312400428392. Its totient is φ = 312400428390.

The previous prime is 312400428341. The next prime is 312400428421. The reversal of 312400428391 is 193824004213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312400428391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312400428391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312400428331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156200214195 + 156200214196.

It is an arithmetic number, because the mean of its divisors is an integer number (156200214196).

Almost surely, 2^312400428391 is an apocalyptic number.

312400428391 is a deficient number, since it is larger than the sum of its proper divisors (1).

312400428391 is an equidigital number, since it uses as much as digits as its factorization.

312400428391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 312400428391 in words is "three hundred twelve billion, four hundred million, four hundred twenty-eight thousand, three hundred ninety-one".