13231709 has 4 divisors (see below), whose sum is σ = 13298400. Its totient is φ = 13165020.

The previous prime is 13231703. The next prime is 13231711. The reversal of 13231709 is 90713231.

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 13231709 - 2¹⁶ = 13166173 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 (13231703) 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, 33047 + ... + 33444.

It is an arithmetic number, because the mean of its divisors is an integer number (3324600).

Almost surely, 2^13231709 is an apocalyptic number.

It is an amenable number.

13231709 is a deficient number, since it is larger than the sum of its proper divisors (66691).

13231709 is an equidigital number, since it uses as much as digits as its factorization.

13231709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66690.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 13231709 is about 3637.5416148822. The cubic root of 13231709 is about 236.5222383575.

The spelling of 13231709 in words is "thirteen million, two hundred thirty-one thousand, seven hundred nine".