13813199 has 4 divisors (see below), whose sum is σ = 13829760. Its totient is φ = 13796640.

The previous prime is 13813181. The next prime is 13813201. The reversal of 13813199 is 99131831.

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 13813199 - 2²⁰ = 12764623 is a prime.

It is a super-2 number, since 2×13813199² = 381608933227202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13813169) 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, 6959 + ... + 8720.

It is an arithmetic number, because the mean of its divisors is an integer number (3457440).

Almost surely, 2^13813199 is an apocalyptic number.

13813199 is a deficient number, since it is larger than the sum of its proper divisors (16561).

13813199 is an equidigital number, since it uses as much as digits as its factorization.

13813199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16560.

The product of its digits is 5832, while the sum is 35.

The square root of 13813199 is about 3716.6112252965. The cubic root of 13813199 is about 239.9374779268.

The spelling of 13813199 in words is "thirteen million, eight hundred thirteen thousand, one hundred ninety-nine".