13925139 has 4 divisors (see below), whose sum is σ = 18566856. Its totient is φ = 9283424.

The previous prime is 13925129. The next prime is 13925243. The reversal of 13925139 is 93152931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93152931 = 3 ⋅31050977.

It is a cyclic number.

It is not a de Polignac number, because 13925139 - 2⁴ = 13925123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13925129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2320854 + ... + 2320859.

It is an arithmetic number, because the mean of its divisors is an integer number (4641714).

Almost surely, 2^13925139 is an apocalyptic number.

13925139 is a deficient number, since it is larger than the sum of its proper divisors (4641717).

13925139 is an equidigital number, since it uses as much as digits as its factorization.

13925139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4641716.

The product of its digits is 7290, while the sum is 33.

The square root of 13925139 is about 3731.6402559732. The cubic root of 13925139 is about 240.5838735357.

The spelling of 13925139 in words is "thirteen million, nine hundred twenty-five thousand, one hundred thirty-nine".