13839509 has 8 divisors (see below), whose sum is σ = 14249088. Its totient is φ = 13433440.

The previous prime is 13839499. The next prime is 13839521. The reversal of 13839509 is 90593831.

13839509 is digitally balanced in base 2, 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 a cyclic number.

It is not a de Polignac number, because 13839509 - 2⁴ = 13839493 is a prime.

It is a super-2 number, since 2×13839509² = 383064018722162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13839569) 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, 8564 + ... + 10050.

It is an arithmetic number, because the mean of its divisors is an integer number (1781136).

Almost surely, 2^13839509 is an apocalyptic number.

It is an amenable number.

13839509 is a deficient number, since it is larger than the sum of its proper divisors (409579).

13839509 is a wasteful number, since it uses less digits than its factorization.

13839509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 13839509 is about 3720.1490561535. The cubic root of 13839509 is about 240.0897176147.

The spelling of 13839509 in words is "thirteen million, eight hundred thirty-nine thousand, five hundred nine".