312124919 has 2 divisors, whose sum is σ = 312124920. Its totient is φ = 312124918.

The previous prime is 312124889. The next prime is 312124921. The reversal of 312124919 is 919421213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312124919 - 2⁸ = 312124663 is a prime.

It is a super-2 number, since 2×312124919² = 194843930121513122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 312124921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312124619) 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, 156062459 + 156062460.

It is an arithmetic number, because the mean of its divisors is an integer number (156062460).

Almost surely, 2^312124919 is an apocalyptic number.

312124919 is a deficient number, since it is larger than the sum of its proper divisors (1).

312124919 is an equidigital number, since it uses as much as digits as its factorization.

312124919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 312124919 is about 17667.0574516528. The cubic root of 312124919 is about 678.3327950595.

The spelling of 312124919 in words is "three hundred twelve million, one hundred twenty-four thousand, nine hundred nineteen".