1312345019 has 2 divisors, whose sum is σ = 1312345020. Its totient is φ = 1312345018.

The previous prime is 1312345007. The next prime is 1312345037. The reversal of 1312345019 is 9105432131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312345019 is a prime.

It is a super-2 number, since 2×1312345019² = 3444498897788220722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312344982 and 1312345000.

It is not a weakly prime, because it can be changed into another prime (1312345819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656172509 + 656172510.

It is an arithmetic number, because the mean of its divisors is an integer number (656172510).

Almost surely, 2^1312345019 is an apocalyptic number.

1312345019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312345019 is an equidigital number, since it uses as much as digits as its factorization.

1312345019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1312345019 is about 36226.3028613189. The cubic root of 1312345019 is about 1094.8366885292.

The spelling of 1312345019 in words is "one billion, three hundred twelve million, three hundred forty-five thousand, nineteen".