1312120379 has 2 divisors, whose sum is σ = 1312120380. Its totient is φ = 1312120378.

The previous prime is 1312120331. The next prime is 1312120393. The reversal of 1312120379 is 9730212131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312120379 - 2²⁸ = 1043684923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312120879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656060189 + 656060190.

It is an arithmetic number, because the mean of its divisors is an integer number (656060190).

Almost surely, 2^1312120379 is an apocalyptic number.

1312120379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312120379 is an equidigital number, since it uses as much as digits as its factorization.

1312120379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 1312120379 is about 36223.2022190198. The cubic root of 1312120379 is about 1094.7742155909.

The spelling of 1312120379 in words is "one billion, three hundred twelve million, one hundred twenty thousand, three hundred seventy-nine".