1312313269 has 2 divisors, whose sum is σ = 1312313270. Its totient is φ = 1312313268.

The previous prime is 1312313267. The next prime is 1312313279. The reversal of 1312313269 is 9623132131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1252452100 + 59861169 = 35390^2 + 7737^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312313269 - 2¹ = 1312313267 is a prime.

It is a super-2 number, since 2×1312313269² = 3444332231986932722, which contains 22 as substring.

Together with 1312313267, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1312313269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312313263) 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, 656156634 + 656156635.

It is an arithmetic number, because the mean of its divisors is an integer number (656156635).

Almost surely, 2^1312313269 is an apocalyptic number.

It is an amenable number.

1312313269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312313269 is an equidigital number, since it uses as much as digits as its factorization.

1312313269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 31.

The square root of 1312313269 is about 36225.8646411649. The cubic root of 1312313269 is about 1094.8278592085.

The spelling of 1312313269 in words is "one billion, three hundred twelve million, three hundred thirteen thousand, two hundred sixty-nine".