13389891 has 8 divisors (see below), whose sum is σ = 17870160. Its totient is φ = 8918112.

The previous prime is 13389881. The next prime is 13389907. The reversal of 13389891 is 19898331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13389891 - 2¹⁸ = 13127747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13389881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4645 + ... + 6953.

It is an arithmetic number, because the mean of its divisors is an integer number (2233770).

Almost surely, 2^13389891 is an apocalyptic number.

13389891 is a deficient number, since it is larger than the sum of its proper divisors (4480269).

13389891 is a wasteful number, since it uses less digits than its factorization.

13389891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245.

The product of its digits is 46656, while the sum is 42.

The square root of 13389891 is about 3659.2199988522. The cubic root of 13389891 is about 237.4610299864.

The spelling of 13389891 in words is "thirteen million, three hundred eighty-nine thousand, eight hundred ninety-one".