13691199 has 4 divisors (see below), whose sum is σ = 18254936. Its totient is φ = 9127464.

The previous prime is 13691189. The next prime is 13691207. The reversal of 13691199 is 99119631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13691199 - 2⁹ = 13690687 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 (13691129) 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, 2281864 + ... + 2281869.

It is an arithmetic number, because the mean of its divisors is an integer number (4563734).

Almost surely, 2^13691199 is an apocalyptic number.

13691199 is a deficient number, since it is larger than the sum of its proper divisors (4563737).

13691199 is an equidigital number, since it uses as much as digits as its factorization.

13691199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4563736.

The product of its digits is 13122, while the sum is 39.

The square root of 13691199 is about 3700.1620234795. The cubic root of 13691199 is about 239.2290015190.

The spelling of 13691199 in words is "thirteen million, six hundred ninety-one thousand, one hundred ninety-nine".