1312798979 has 2 divisors, whose sum is σ = 1312798980. Its totient is φ = 1312798978.

The previous prime is 1312798969. The next prime is 1312799009. The reversal of 1312798979 is 9798972131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312798979 - 2⁸ = 1312798723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312798969) 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, 656399489 + 656399490.

It is an arithmetic number, because the mean of its divisors is an integer number (656399490).

Almost surely, 2^1312798979 is an apocalyptic number.

1312798979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312798979 is an equidigital number, since it uses as much as digits as its factorization.

1312798979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 56.

The square root of 1312798979 is about 36232.5679327315. The cubic root of 1312798979 is about 1094.9629141683.

The spelling of 1312798979 in words is "one billion, three hundred twelve million, seven hundred ninety-eight thousand, nine hundred seventy-nine".