1323555985 has 4 divisors (see below), whose sum is σ = 1588267188. Its totient is φ = 1058844784.

The previous prime is 1323555983. The next prime is 1323556009. The reversal of 1323555985 is 5895553231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 419471361 + 904084624 = 20481^2 + 30068^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323555985 - 2¹ = 1323555983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323555983) 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 in 3 ways as a sum of consecutive naturals, for example, 132355594 + ... + 132355603.

It is an arithmetic number, because the mean of its divisors is an integer number (397066797).

Almost surely, 2^1323555985 is an apocalyptic number.

It is an amenable number.

1323555985 is a deficient number, since it is larger than the sum of its proper divisors (264711203).

1323555985 is an equidigital number, since it uses as much as digits as its factorization.

1323555985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264711202.

The product of its digits is 810000, while the sum is 46.

The square root of 1323555985 is about 36380.7089678033. The cubic root of 1323555985 is about 1097.9454722021.

The spelling of 1323555985 in words is "one billion, three hundred twenty-three million, five hundred fifty-five thousand, nine hundred eighty-five".