13588991 has 4 divisors (see below), whose sum is σ = 14634312. Its totient is φ = 12543672.

The previous prime is 13588979. The next prime is 13588997. The reversal of 13588991 is 19988531.

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 13588991 - 2¹⁰ = 13587967 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 (13588997) 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, 522641 + ... + 522666.

It is an arithmetic number, because the mean of its divisors is an integer number (3658578).

Almost surely, 2^13588991 is an apocalyptic number.

13588991 is a deficient number, since it is larger than the sum of its proper divisors (1045321).

13588991 is a wasteful number, since it uses less digits than its factorization.

13588991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045320.

The product of its digits is 77760, while the sum is 44.

The square root of 13588991 is about 3686.3248636006. The cubic root of 13588991 is about 238.6322138593.

The spelling of 13588991 in words is "thirteen million, five hundred eighty-eight thousand, nine hundred ninety-one".