1312012319 has 2 divisors, whose sum is σ = 1312012320. Its totient is φ = 1312012318.

The previous prime is 1312012313. The next prime is 1312012343. The reversal of 1312012319 is 9132102131.

It is a weak prime.

It is an emirp because it is prime and its reverse (9132102131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1312012319 - 2⁸ = 1312012063 is a prime.

It is a super-2 number, since 2×1312012319² = 3442752650415515522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312012294 and 1312012303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312012313) 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, 656006159 + 656006160.

It is an arithmetic number, because the mean of its divisors is an integer number (656006160).

Almost surely, 2^1312012319 is an apocalyptic number.

1312012319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312012319 is an equidigital number, since it uses as much as digits as its factorization.

1312012319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1312012319 is about 36221.7106028967. The cubic root of 1312012319 is about 1094.7441612983.

The spelling of 1312012319 in words is "one billion, three hundred twelve million, twelve thousand, three hundred nineteen".