13818859 has 4 divisors (see below), whose sum is σ = 13842016. Its totient is φ = 13795704.

The previous prime is 13818853. The next prime is 13818863. The reversal of 13818859 is 95881831.

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 13818859 - 2⁷ = 13818731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13818853) 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, 10659 + ... + 11884.

It is an arithmetic number, because the mean of its divisors is an integer number (3460504).

Almost surely, 2^13818859 is an apocalyptic number.

13818859 is a deficient number, since it is larger than the sum of its proper divisors (23157).

13818859 is an equidigital number, since it uses as much as digits as its factorization.

13818859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23156.

The product of its digits is 69120, while the sum is 43.

The square root of 13818859 is about 3717.3725936473. The cubic root of 13818859 is about 239.9702451538.

The spelling of 13818859 in words is "thirteen million, eight hundred eighteen thousand, eight hundred fifty-nine".