13725909 has 8 divisors (see below), whose sum is σ = 20334720. Its totient is φ = 9150588.

The previous prime is 13725889. The next prime is 13725911. The reversal of 13725909 is 90952731.

13725909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13725909 - 2²⁰ = 12677333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13725979) 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, 254157 + ... + 254210.

It is an arithmetic number, because the mean of its divisors is an integer number (2541840).

Almost surely, 2^13725909 is an apocalyptic number.

It is an amenable number.

13725909 is a deficient number, since it is larger than the sum of its proper divisors (6608811).

13725909 is an equidigital number, since it uses as much as digits as its factorization.

13725909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508376 (or 508370 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 13725909 is about 3704.8493896514. The cubic root of 13725909 is about 239.4309957920.

The spelling of 13725909 in words is "thirteen million, seven hundred twenty-five thousand, nine hundred nine".