13929925 has 6 divisors (see below), whose sum is σ = 17273138. Its totient is φ = 11143920.

The previous prime is 13929913. The next prime is 13929961. The reversal of 13929925 is 52992931.

13929925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 158404 + 13771521 = 398^2 + 3711^2 .

It is not a de Polignac number, because 13929925 - 2²¹ = 11832773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278574 + ... + 278623.

Almost surely, 2^13929925 is an apocalyptic number.

It is an amenable number.

13929925 is a deficient number, since it is larger than the sum of its proper divisors (3343213).

13929925 is an equidigital number, since it uses as much as digits as its factorization.

13929925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557207 (or 557202 counting only the distinct ones).

The product of its digits is 43740, while the sum is 40.

The square root of 13929925 is about 3732.2814738441. The cubic root of 13929925 is about 240.6114328664.

The spelling of 13929925 in words is "thirteen million, nine hundred twenty-nine thousand, nine hundred twenty-five".