1323131239 has 4 divisors (see below), whose sum is σ = 1323224424. Its totient is φ = 1323038056.

The previous prime is 1323131237. The next prime is 1323131269. The reversal of 1323131239 is 9321313231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1323131239 - 2¹ = 1323131237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323131237) 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, 20377 + ... + 55330.

It is an arithmetic number, because the mean of its divisors is an integer number (330806106).

Almost surely, 2^1323131239 is an apocalyptic number.

1323131239 is a deficient number, since it is larger than the sum of its proper divisors (93185).

1323131239 is an equidigital number, since it uses as much as digits as its factorization.

1323131239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93184.

The product of its digits is 2916, while the sum is 28.

The square root of 1323131239 is about 36374.8709825891. The cubic root of 1323131239 is about 1097.8280114002.

The spelling of 1323131239 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred thirty-nine".