13723609 has 4 divisors (see below), whose sum is σ = 13822480. Its totient is φ = 13624740.

The previous prime is 13723537. The next prime is 13723613. The reversal of 13723609 is 90632731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13723609 - 2⁷ = 13723481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13723009) 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, 49227 + ... + 49504.

It is an arithmetic number, because the mean of its divisors is an integer number (3455620).

Almost surely, 2^13723609 is an apocalyptic number.

It is an amenable number.

13723609 is a deficient number, since it is larger than the sum of its proper divisors (98871).

13723609 is an equidigital number, since it uses as much as digits as its factorization.

13723609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98870.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 13723609 is about 3704.5389726658. The cubic root of 13723609 is about 239.4176215217.

The spelling of 13723609 in words is "thirteen million, seven hundred twenty-three thousand, six hundred nine".