312231379 has 2 divisors, whose sum is σ = 312231380. Its totient is φ = 312231378.

The previous prime is 312231377. The next prime is 312231421. The reversal of 312231379 is 973132213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312231379 - 2¹ = 312231377 is a prime.

Together with 312231377, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 312231379.

It is not a weakly prime, because it can be changed into another prime (312231377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156115689 + 156115690.

It is an arithmetic number, because the mean of its divisors is an integer number (156115690).

Almost surely, 2^312231379 is an apocalyptic number.

312231379 is a deficient number, since it is larger than the sum of its proper divisors (1).

312231379 is an equidigital number, since it uses as much as digits as its factorization.

312231379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 312231379 is about 17670.0701470028. The cubic root of 312231379 is about 678.4099085229.

The spelling of 312231379 in words is "three hundred twelve million, two hundred thirty-one thousand, three hundred seventy-nine".