13765709 has 12 divisors (see below), whose sum is σ = 14886720. Its totient is φ = 12693600.

The previous prime is 13765673. The next prime is 13765721. The reversal of 13765709 is 90756731.

It is a de Polignac number, because none of the positive numbers 2^k-13765709 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 (13765789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31724 + ... + 32154.

It is an arithmetic number, because the mean of its divisors is an integer number (1240560).

Almost surely, 2^13765709 is an apocalyptic number.

13765709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13765709 is a deficient number, since it is larger than the sum of its proper divisors (1121011).

13765709 is an equidigital number, since it uses as much as digits as its factorization.

13765709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 13765709 is about 3710.2168400243. The cubic root of 13765709 is about 239.6621925727.

The spelling of 13765709 in words is "thirteen million, seven hundred sixty-five thousand, seven hundred nine".