13809765 has 8 divisors (see below), whose sum is σ = 22095648. Its totient is φ = 7365200.

The previous prime is 13809749. The next prime is 13809773. The reversal of 13809765 is 56790831.

13809765 is digitally balanced in base 2, because in such base 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 not a de Polignac number, because 13809765 - 2⁴ = 13809749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460311 + ... + 460340.

It is an arithmetic number, because the mean of its divisors is an integer number (2761956).

Almost surely, 2^13809765 is an apocalyptic number.

13809765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13809765 is a deficient number, since it is larger than the sum of its proper divisors (8285883).

13809765 is an equidigital number, since it uses as much as digits as its factorization.

13809765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920659.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 13809765 is about 3716.1492165950. The cubic root of 13809765 is about 239.9175932357.

The spelling of 13809765 in words is "thirteen million, eight hundred nine thousand, seven hundred sixty-five".