312548939 has 2 divisors, whose sum is σ = 312548940. Its totient is φ = 312548938.

The previous prime is 312548891. The next prime is 312548947. The reversal of 312548939 is 939845213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312548939 - 2¹⁶ = 312483403 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312548939.

It is not a weakly prime, because it can be changed into another prime (312548959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156274469 + 156274470.

It is an arithmetic number, because the mean of its divisors is an integer number (156274470).

Almost surely, 2^312548939 is an apocalyptic number.

312548939 is a deficient number, since it is larger than the sum of its proper divisors (1).

312548939 is an equidigital number, since it uses as much as digits as its factorization.

312548939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 312548939 is about 17679.0536794253. The cubic root of 312548939 is about 678.6398265353.

The spelling of 312548939 in words is "three hundred twelve million, five hundred forty-eight thousand, nine hundred thirty-nine".