13925609 has 4 divisors (see below), whose sum is σ = 14265300. Its totient is φ = 13585920.

The previous prime is 13925573. The next prime is 13925617. The reversal of 13925609 is 90652931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90652931 = 1283 ⋅70657.

It can be written as a sum of positive squares in 2 ways, for example, as 7139584 + 6786025 = 2672^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 13925609 - 2¹² = 13921513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13924609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169784 + ... + 169865.

It is an arithmetic number, because the mean of its divisors is an integer number (3566325).

Almost surely, 2^13925609 is an apocalyptic number.

It is an amenable number.

13925609 is a deficient number, since it is larger than the sum of its proper divisors (339691).

13925609 is an equidigital number, since it uses as much as digits as its factorization.

13925609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339690.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 13925609 is about 3731.7032304298. The cubic root of 13925609 is about 240.5865802268.

The spelling of 13925609 in words is "thirteen million, nine hundred twenty-five thousand, six hundred nine".