13552639 has 4 divisors (see below), whose sum is σ = 13650280. Its totient is φ = 13455000.

The previous prime is 13552633. The next prime is 13552691. The reversal of 13552639 is 93625531.

It is a happy number.

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 13552639 - 2¹⁵ = 13519871 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 (13552633) 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, 48612 + ... + 48889.

It is an arithmetic number, because the mean of its divisors is an integer number (3412570).

Almost surely, 2^13552639 is an apocalyptic number.

13552639 is a deficient number, since it is larger than the sum of its proper divisors (97641).

13552639 is an equidigital number, since it uses as much as digits as its factorization.

13552639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97640.

The product of its digits is 24300, while the sum is 34.

The square root of 13552639 is about 3681.3909056225. The cubic root of 13552639 is about 238.4192349595.

The spelling of 13552639 in words is "thirteen million, five hundred fifty-two thousand, six hundred thirty-nine".