1312321019 has 2 divisors, whose sum is σ = 1312321020. Its totient is φ = 1312321018.

The previous prime is 1312320979. The next prime is 1312321039. The reversal of 1312321019 is 9101232131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312321019 is a prime.

It is a super-2 number, since 2×1312321019² = 3444372913818396722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312320985 and 1312321003.

It is not a weakly prime, because it can be changed into another prime (1312321039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656160509 + 656160510.

It is an arithmetic number, because the mean of its divisors is an integer number (656160510).

Almost surely, 2^1312321019 is an apocalyptic number.

1312321019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312321019 is an equidigital number, since it uses as much as digits as its factorization.

1312321019 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 1312321019 is about 36225.9716087781. The cubic root of 1312321019 is about 1094.8300144102.

The spelling of 1312321019 in words is "one billion, three hundred twelve million, three hundred twenty-one thousand, nineteen".