1312320319 has 2 divisors, whose sum is σ = 1312320320. Its totient is φ = 1312320318.

The previous prime is 1312320301. The next prime is 1312320349. The reversal of 1312320319 is 9130232131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312320319 - 2²³ = 1303931711 is a prime.

It is a super-2 number, since 2×1312320319² = 3444369239320523522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312320293 and 1312320302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312320349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656160159 + 656160160.

It is an arithmetic number, because the mean of its divisors is an integer number (656160160).

Almost surely, 2^1312320319 is an apocalyptic number.

1312320319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312320319 is an equidigital number, since it uses as much as digits as its factorization.

1312320319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1312320319 is about 36225.9619472002. The cubic root of 1312320319 is about 1094.8298197472.

The spelling of 1312320319 in words is "one billion, three hundred twelve million, three hundred twenty thousand, three hundred nineteen".