1323131269 has 2 divisors, whose sum is σ = 1323131270. Its totient is φ = 1323131268.

The previous prime is 1323131237. The next prime is 1323131279. The reversal of 1323131269 is 9621313231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1246796100 + 76335169 = 35310^2 + 8737^2 .

It is an emirp because it is prime and its reverse (9621313231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323131269 - 2⁵ = 1323131237 is a prime.

It is a super-2 number, since 2×1323131269² = 3501352710011100722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1323131269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323131279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661565634 + 661565635.

It is an arithmetic number, because the mean of its divisors is an integer number (661565635).

Almost surely, 2^1323131269 is an apocalyptic number.

It is an amenable number.

1323131269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323131269 is an equidigital number, since it uses as much as digits as its factorization.

1323131269 is an evil number, because the sum of its binary digits is even.

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

The square root of 1323131269 is about 36374.8713949617. The cubic root of 1323131269 is about 1097.8280196974.

The spelling of 1323131269 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred sixty-nine".