1312444291 has 2 divisors, whose sum is σ = 1312444292. Its totient is φ = 1312444290.

The previous prime is 1312444283. The next prime is 1312444333. The reversal of 1312444291 is 1924442131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312444291 - 2³ = 1312444283 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312445291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656222145 + 656222146.

It is an arithmetic number, because the mean of its divisors is an integer number (656222146).

Almost surely, 2^1312444291 is an apocalyptic number.

1312444291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312444291 is an equidigital number, since it uses as much as digits as its factorization.

1312444291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 1312444291 is about 36227.6730000700. The cubic root of 1312444291 is about 1094.8642940460.

The spelling of 1312444291 in words is "one billion, three hundred twelve million, four hundred forty-four thousand, two hundred ninety-one".