13705239 has 8 divisors (see below), whose sum is σ = 18524272. Its totient is φ = 9011520.

The previous prime is 13705231. The next prime is 13705243. The reversal of 13705239 is 93250731.

13705239 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13705239 - 2³ = 13705231 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 (13705231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31072 + ... + 31509.

It is an arithmetic number, because the mean of its divisors is an integer number (2315534).

Almost surely, 2^13705239 is an apocalyptic number.

13705239 is a deficient number, since it is larger than the sum of its proper divisors (4819033).

13705239 is an equidigital number, since it uses as much as digits as its factorization.

13705239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62657.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 13705239 is about 3702.0587515597. The cubic root of 13705239 is about 239.3107481388.

The spelling of 13705239 in words is "thirteen million, seven hundred five thousand, two hundred thirty-nine".