13489815 has 8 divisors (see below), whose sum is σ = 21583728. Its totient is φ = 7194560.

The previous prime is 13489783. The next prime is 13489837. The reversal of 13489815 is 51898431.

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

It is not a de Polignac number, because 13489815 - 2⁵ = 13489783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449646 + ... + 449675.

It is an arithmetic number, because the mean of its divisors is an integer number (2697966).

Almost surely, 2^13489815 is an apocalyptic number.

13489815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13489815 is a deficient number, since it is larger than the sum of its proper divisors (8093913).

13489815 is an equidigital number, since it uses as much as digits as its factorization.

13489815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899329.

The product of its digits is 34560, while the sum is 39.

The square root of 13489815 is about 3672.8483497144. The cubic root of 13489815 is about 238.0502624349.

The spelling of 13489815 in words is "thirteen million, four hundred eighty-nine thousand, eight hundred fifteen".