312504139 has 2 divisors, whose sum is σ = 312504140. Its totient is φ = 312504138.

The previous prime is 312504133. The next prime is 312504209. The reversal of 312504139 is 931405213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312504139 - 2⁹ = 312503627 is a prime.

It is not a weakly prime, because it can be changed into another prime (312504133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156252069 + 156252070.

It is an arithmetic number, because the mean of its divisors is an integer number (156252070).

Almost surely, 2^312504139 is an apocalyptic number.

312504139 is a deficient number, since it is larger than the sum of its proper divisors (1).

312504139 is an equidigital number, since it uses as much as digits as its factorization.

312504139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 312504139 is about 17677.7865978747. The cubic root of 312504139 is about 678.6074001287.

The spelling of 312504139 in words is "three hundred twelve million, five hundred four thousand, one hundred thirty-nine".