13985917 has 16 divisors (see below), whose sum is σ = 16718400. Its totient is φ = 11549440.

The previous prime is 13985911. The next prime is 13985927. The reversal of 13985917 is 71958931.

It is a cyclic number.

It is not a de Polignac number, because 13985917 - 2²³ = 5597309 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 (13985911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4134 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (1044900).

Almost surely, 2^13985917 is an apocalyptic number.

13985917 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13985917 is a deficient number, since it is larger than the sum of its proper divisors (2732483).

13985917 is a wasteful number, since it uses less digits than its factorization.

13985917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its digits is 68040, while the sum is 43.

The square root of 13985917 is about 3739.7749932315. The cubic root of 13985917 is about 240.9333849391.

It can be divided in two parts, 139859 and 17, that added together give a square (139876 = 374²).

The spelling of 13985917 in words is "thirteen million, nine hundred eighty-five thousand, nine hundred seventeen".