13890709 has 8 divisors (see below), whose sum is σ = 16213248. Its totient is φ = 11652720.

The previous prime is 13890707. The next prime is 13890731. The reversal of 13890709 is 90709831.

13890709 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 a cyclic number.

It is not a de Polignac number, because 13890709 - 2¹ = 13890707 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 (13890703) 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, 20782 + ... + 21439.

It is an arithmetic number, because the mean of its divisors is an integer number (2026656).

Almost surely, 2^13890709 is an apocalyptic number.

It is an amenable number.

13890709 is a deficient number, since it is larger than the sum of its proper divisors (2322539).

13890709 is an equidigital number, since it uses as much as digits as its factorization.

13890709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42275.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 13890709 is about 3727.0241480302. The cubic root of 13890709 is about 240.3854281438.

The spelling of 13890709 in words is "thirteen million, eight hundred ninety thousand, seven hundred nine".