13799891 has 8 divisors (see below), whose sum is σ = 15840864. Its totient is φ = 11776320.

The previous prime is 13799887. The next prime is 13799917. The reversal of 13799891 is 19899731.

It is a happy number.

13799891 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13799891 - 2² = 13799887 is a prime.

It is a super-2 number, since 2×13799891² = 380873983223762, which contains 22 as substring.

It is a Duffinian number.

13799891 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (13799831) 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, 2600 + ... + 5861.

It is an arithmetic number, because the mean of its divisors is an integer number (1980108).

Almost surely, 2^13799891 is an apocalyptic number.

13799891 is a deficient number, since it is larger than the sum of its proper divisors (2040973).

13799891 is an equidigital number, since it uses as much as digits as its factorization.

13799891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8701.

The product of its digits is 122472, while the sum is 47.

The square root of 13799891 is about 3714.8204532655. The cubic root of 13799891 is about 239.8603991381.

The spelling of 13799891 in words is "thirteen million, seven hundred ninety-nine thousand, eight hundred ninety-one".