13609279 has 4 divisors (see below), whose sum is σ = 14048320. Its totient is φ = 13170240.

The previous prime is 13609247. The next prime is 13609291. The reversal of 13609279 is 97290631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97290631 = 1217 ⋅79943.

It is a cyclic number.

It is not a de Polignac number, because 13609279 - 2⁵ = 13609247 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 (13609579) 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, 219474 + ... + 219535.

It is an arithmetic number, because the mean of its divisors is an integer number (3512080).

Almost surely, 2^13609279 is an apocalyptic number.

13609279 is a deficient number, since it is larger than the sum of its proper divisors (439041).

13609279 is an equidigital number, since it uses as much as digits as its factorization.

13609279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439040.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 13609279 is about 3689.0756294768. The cubic root of 13609279 is about 238.7509119781.

The spelling of 13609279 in words is "thirteen million, six hundred nine thousand, two hundred seventy-nine".