13660239 has 4 divisors (see below), whose sum is σ = 18213656. Its totient is φ = 9106824.

The previous prime is 13660201. The next prime is 13660249. The reversal of 13660239 is 93206631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13660239 - 2¹² = 13656143 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 (13660249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276704 + ... + 2276709.

It is an arithmetic number, because the mean of its divisors is an integer number (4553414).

Almost surely, 2^13660239 is an apocalyptic number.

13660239 is a deficient number, since it is larger than the sum of its proper divisors (4553417).

13660239 is an equidigital number, since it uses as much as digits as its factorization.

13660239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4553416.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 13660239 is about 3695.9760551172. The cubic root of 13660239 is about 239.0485420446.

The spelling of 13660239 in words is "thirteen million, six hundred sixty thousand, two hundred thirty-nine".