312220379 has 2 divisors, whose sum is σ = 312220380. Its totient is φ = 312220378.

The previous prime is 312220373. The next prime is 312220417. The reversal of 312220379 is 973022213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312220379 - 2²⁴ = 295443163 is a prime.

It is not a weakly prime, because it can be changed into another prime (312220373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156110189 + 156110190.

It is an arithmetic number, because the mean of its divisors is an integer number (156110190).

Almost surely, 2^312220379 is an apocalyptic number.

312220379 is a deficient number, since it is larger than the sum of its proper divisors (1).

312220379 is an equidigital number, since it uses as much as digits as its factorization.

312220379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 312220379 is about 17669.7588834709. The cubic root of 312220379 is about 678.4019415715.

The spelling of 312220379 in words is "three hundred twelve million, two hundred twenty thousand, three hundred seventy-nine".