13668975 has 36 divisors (see below), whose sum is σ = 24824800. Its totient is φ = 7188480.

The previous prime is 13668937. The next prime is 13668979. The reversal of 13668975 is 57986631.

It is a happy number.

13668975 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13668975 - 2⁶ = 13668911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (272160) is a multiple of the sum of its prime factors (864).

It is a self number, because there is not a number n which added to its sum of digits gives 13668975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13668979) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17391 + ... + 18159.

Almost surely, 2^13668975 is an apocalyptic number.

13668975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13668975 is a deficient number, since it is larger than the sum of its proper divisors (11155825).

13668975 is a wasteful number, since it uses less digits than its factorization.

13668975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 856 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 13668975 is about 3697.1576920656. The cubic root of 13668975 is about 239.0994899830.

The spelling of 13668975 in words is "thirteen million, six hundred sixty-eight thousand, nine hundred seventy-five".