1312923261019 has 2 divisors, whose sum is σ = 1312923261020. Its totient is φ = 1312923261018.

The previous prime is 1312923260917. The next prime is 1312923261059. The reversal of 1312923261019 is 9101623292131.

It is an a-pointer prime, because the next prime (1312923261059) can be obtained adding 1312923261019 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312923261019 - 2¹⁹ = 1312922736731 is a prime.

It is a super-2 number, since 2×1312923261019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1312923261059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656461630509 + 656461630510.

It is an arithmetic number, because the mean of its divisors is an integer number (656461630510).

Almost surely, 2^{1312923261019} is an apocalyptic number.

1312923261019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312923261019 is an equidigital number, since it uses as much as digits as its factorization.

1312923261019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 1312923261019 in words is "one trillion, three hundred twelve billion, nine hundred twenty-three million, two hundred sixty-one thousand, nineteen".