312384726578489 has 2 divisors, whose sum is σ = 312384726578490. Its totient is φ = 312384726578488.

The previous prime is 312384726578447. The next prime is 312384726578521. The reversal of 312384726578489 is 984875627483213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288112432515625 + 24272294062864 = 16973875^2 + 4926692^2 .

It is a cyclic number.

It is not a de Polignac number, because 312384726578489 - 2²⁸ = 312384458143033 is a prime.

It is not a weakly prime, because it can be changed into another prime (312384726578789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156192363289244 + 156192363289245.

It is an arithmetic number, because the mean of its divisors is an integer number (156192363289245).

Almost surely, 2^{312384726578489} is an apocalyptic number.

It is an amenable number.

312384726578489 is a deficient number, since it is larger than the sum of its proper divisors (1).

312384726578489 is an equidigital number, since it uses as much as digits as its factorization.

312384726578489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3901685760, while the sum is 77.

The spelling of 312384726578489 in words is "three hundred twelve trillion, three hundred eighty-four billion, seven hundred twenty-six million, five hundred seventy-eight thousand, four hundred eighty-nine".