1326138269 has 4 divisors (see below), whose sum is σ = 1395935040. Its totient is φ = 1256341500.

The previous prime is 1326138263. The next prime is 1326138271. The reversal of 1326138269 is 9628316231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1326138269 is a prime.

It is a super-2 number, since 2×1326138269² = 3517285417012632722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326138263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34898357 + ... + 34898394.

It is an arithmetic number, because the mean of its divisors is an integer number (348983760).

Almost surely, 2^1326138269 is an apocalyptic number.

1326138269 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1326138269 is a deficient number, since it is larger than the sum of its proper divisors (69796771).

1326138269 is an equidigital number, since it uses as much as digits as its factorization.

1326138269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69796770.

The product of its digits is 93312, while the sum is 41.

The square root of 1326138269 is about 36416.1814170569. The cubic root of 1326138269 is about 1098.6590461411.

The spelling of 1326138269 in words is "one billion, three hundred twenty-six million, one hundred thirty-eight thousand, two hundred sixty-nine".