1323539439 has 16 divisors (see below), whose sum is σ = 1904947200. Its totient is φ = 814891616.

The previous prime is 1323539419. The next prime is 1323539453. The reversal of 1323539439 is 9349353231.

It is a cyclic number.

It is not a de Polignac number, because 1323539439 - 2⁵ = 1323539407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1323539439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323539419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328719 + ... + 332720.

It is an arithmetic number, because the mean of its divisors is an integer number (119059200).

Almost surely, 2^1323539439 is an apocalyptic number.

1323539439 is a deficient number, since it is larger than the sum of its proper divisors (581407761).

1323539439 is a wasteful number, since it uses less digits than its factorization.

1323539439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661494.

The product of its digits is 262440, while the sum is 42.

The square root of 1323539439 is about 36380.4815663564. The cubic root of 1323539439 is about 1097.9408969816.

The spelling of 1323539439 in words is "one billion, three hundred twenty-three million, five hundred thirty-nine thousand, four hundred thirty-nine".