13917645 has 96 divisors (see below), whose sum is σ = 30730752. Its totient is φ = 5677056.

The previous prime is 13917637. The next prime is 13917703. The reversal of 13917645 is 54671931.

13917645 is a `hidden beast` number, since 1 + 3 + 9 + 1 + 7 + 645 = 666.

It is not a de Polignac number, because 13917645 - 2³ = 13917637 is a prime.

It is a super-3 number, since 3×13917645³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

Its product of digits (22680) is a multiple of the sum of its prime divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 123109 + ... + 123221.

It is an arithmetic number, because the mean of its divisors is an integer number (320112).

Almost surely, 2^13917645 is an apocalyptic number.

13917645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13917645 is an abundant number, since it is smaller than the sum of its proper divisors (16813107).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13917645 is a wasteful number, since it uses less digits than its factorization.

13917645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 168 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 13917645 is about 3730.6360047584. The cubic root of 13917645 is about 240.5407079805.

The spelling of 13917645 in words is "thirteen million, nine hundred seventeen thousand, six hundred forty-five".