13986517 has 4 divisors (see below), whose sum is σ = 14059180. Its totient is φ = 13913856.

The previous prime is 13986509. The next prime is 13986547. The reversal of 13986517 is 71568931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2090916 + 11895601 = 1446^2 + 3449^2 .

It is a cyclic number.

It is not a de Polignac number, because 13986517 - 2³ = 13986509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13986517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13986547) 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, 36042 + ... + 36427.

It is an arithmetic number, because the mean of its divisors is an integer number (3514795).

Almost surely, 2^13986517 is an apocalyptic number.

It is an amenable number.

13986517 is a deficient number, since it is larger than the sum of its proper divisors (72663).

13986517 is an equidigital number, since it uses as much as digits as its factorization.

13986517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72662.

The product of its digits is 45360, while the sum is 40.

The square root of 13986517 is about 3739.8552111011. The cubic root of 13986517 is about 240.9368302611.

The spelling of 13986517 in words is "thirteen million, nine hundred eighty-six thousand, five hundred seventeen".