13668239 has 8 divisors (see below), whose sum is σ = 15494640. Its totient is φ = 11952576.

The previous prime is 13668227. The next prime is 13668247. The reversal of 13668239 is 93286631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13668239 - 2¹² = 13664143 is a prime.

It is a super-2 number, since 2×13668239² = 373641514722242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13668269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27422 + ... + 27915.

It is an arithmetic number, because the mean of its divisors is an integer number (1936830).

Almost surely, 2^13668239 is an apocalyptic number.

13668239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13668239 is a deficient number, since it is larger than the sum of its proper divisors (1826401).

13668239 is a wasteful number, since it uses less digits than its factorization.

13668239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55369.

The product of its digits is 46656, while the sum is 38.

The square root of 13668239 is about 3697.0581548036. The cubic root of 13668239 is about 239.0951985034.

The spelling of 13668239 in words is "thirteen million, six hundred sixty-eight thousand, two hundred thirty-nine".