1313319979 has 2 divisors, whose sum is σ = 1313319980. Its totient is φ = 1313319978.

The previous prime is 1313319977. The next prime is 1313319983. The reversal of 1313319979 is 9799133131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313319979 - 2¹ = 1313319977 is a prime.

Together with 1313319977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1313319971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656659989 + 656659990.

It is an arithmetic number, because the mean of its divisors is an integer number (656659990).

Almost surely, 2^1313319979 is an apocalyptic number.

1313319979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313319979 is an equidigital number, since it uses as much as digits as its factorization.

1313319979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137781, while the sum is 46.

The square root of 1313319979 is about 36239.7568838424. The cubic root of 1313319979 is about 1095.1077447269.

The spelling of 1313319979 in words is "one billion, three hundred thirteen million, three hundred nineteen thousand, nine hundred seventy-nine".