13706239 has 4 divisors (see below), whose sum is σ = 14427640. Its totient is φ = 12984840.

The previous prime is 13706227. The next prime is 13706269. The reversal of 13706239 is 93260731.

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

It is a cyclic number.

It is not a de Polignac number, because 13706239 - 2⁷ = 13706111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13706239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13706219) 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, 360672 + ... + 360709.

It is an arithmetic number, because the mean of its divisors is an integer number (3606910).

Almost surely, 2^13706239 is an apocalyptic number.

13706239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13706239 is a deficient number, since it is larger than the sum of its proper divisors (721401).

13706239 is an equidigital number, since it uses as much as digits as its factorization.

13706239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721400.

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

The square root of 13706239 is about 3702.1938090813. The cubic root of 13706239 is about 239.3165684174.

The spelling of 13706239 in words is "thirteen million, seven hundred six thousand, two hundred thirty-nine".