312113639 has 2 divisors, whose sum is σ = 312113640. Its totient is φ = 312113638.

The previous prime is 312113621. The next prime is 312113647. The reversal of 312113639 is 936311213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312113639 - 2⁸ = 312113383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312113609) 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, 156056819 + 156056820.

It is an arithmetic number, because the mean of its divisors is an integer number (156056820).

Almost surely, 2^312113639 is an apocalyptic number.

312113639 is a deficient number, since it is larger than the sum of its proper divisors (1).

312113639 is an equidigital number, since it uses as much as digits as its factorization.

312113639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 29.

The square root of 312113639 is about 17666.7382105470. The cubic root of 312113639 is about 678.3246234530.

The spelling of 312113639 in words is "three hundred twelve million, one hundred thirteen thousand, six hundred thirty-nine".