13917689 has 4 divisors (see below), whose sum is σ = 14085456. Its totient is φ = 13749924.

The previous prime is 13917637. The next prime is 13917703. The reversal of 13917689 is 98671931.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13917689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13917619) 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, 83759 + ... + 83924.

It is an arithmetic number, because the mean of its divisors is an integer number (3521364).

Almost surely, 2^13917689 is an apocalyptic number.

It is an amenable number.

13917689 is a deficient number, since it is larger than the sum of its proper divisors (167767).

13917689 is an equidigital number, since it uses as much as digits as its factorization.

13917689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167766.

The product of its digits is 81648, while the sum is 44.

The square root of 13917689 is about 3730.6419018716. The cubic root of 13917689 is about 240.5409614664.

The spelling of 13917689 in words is "thirteen million, nine hundred seventeen thousand, six hundred eighty-nine".