13938689 has 4 divisors (see below), whose sum is σ = 13970880. Its totient is φ = 13906500.

The previous prime is 13938679. The next prime is 13938697. The reversal of 13938689 is 98683931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98683931 = 59 ⋅1672609.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13938689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13938679) 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, 15437 + ... + 16314.

It is an arithmetic number, because the mean of its divisors is an integer number (3492720).

It is a Proth number, since it is equal to 3403 ⋅ 2¹² + 1 and 3403 < 2¹².

Almost surely, 2^13938689 is an apocalyptic number.

It is an amenable number.

13938689 is a deficient number, since it is larger than the sum of its proper divisors (32191).

13938689 is an equidigital number, since it uses as much as digits as its factorization.

13938689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32190.

The product of its digits is 279936, while the sum is 47.

The square root of 13938689 is about 3733.4553700292. The cubic root of 13938689 is about 240.6618824445.

The spelling of 13938689 in words is "thirteen million, nine hundred thirty-eight thousand, six hundred eighty-nine".