13799765 has 16 divisors (see below), whose sum is σ = 18990720. Its totient is φ = 9430080.

The previous prime is 13799761. The next prime is 13799771. The reversal of 13799765 is 56799731.

It is a happy number.

It is not a de Polignac number, because 13799765 - 2² = 13799761 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13799761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14195 + ... + 15135.

It is an arithmetic number, because the mean of its divisors is an integer number (1186920).

Almost surely, 2^13799765 is an apocalyptic number.

It is an amenable number.

13799765 is a deficient number, since it is larger than the sum of its proper divisors (5190955).

13799765 is an equidigital number, since it uses as much as digits as its factorization.

13799765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372.

The product of its digits is 357210, while the sum is 47.

The square root of 13799765 is about 3714.8034941299. The cubic root of 13799765 is about 239.8596691203.

The spelling of 13799765 in words is "thirteen million, seven hundred ninety-nine thousand, seven hundred sixty-five".