13331639 has 4 divisors (see below), whose sum is σ = 13420080. Its totient is φ = 13243200.

The previous prime is 13331623. The next prime is 13331641. The reversal of 13331639 is 93613331.

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

It is a cyclic number.

It is not a de Polignac number, because 13331639 - 2⁴ = 13331623 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 (13331239) 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, 43994 + ... + 44295.

It is an arithmetic number, because the mean of its divisors is an integer number (3355020).

Almost surely, 2^13331639 is an apocalyptic number.

13331639 is a deficient number, since it is larger than the sum of its proper divisors (88441).

13331639 is an equidigital number, since it uses as much as digits as its factorization.

13331639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88440.

The product of its digits is 4374, while the sum is 29.

The square root of 13331639 is about 3651.2517031834. The cubic root of 13331639 is about 237.1161756024.

The spelling of 13331639 in words is "thirteen million, three hundred thirty-one thousand, six hundred thirty-nine".