13668972 has 12 divisors (see below), whose sum is σ = 31894296. Its totient is φ = 4556320.

The previous prime is 13668937. The next prime is 13668979. The reversal of 13668972 is 27986631.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 569529 + ... + 569552.

It is an arithmetic number, because the mean of its divisors is an integer number (2657858).

Almost surely, 2^13668972 is an apocalyptic number.

13668972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13668972 is an abundant number, since it is smaller than the sum of its proper divisors (18225324).

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

13668972 is a wasteful number, since it uses less digits than its factorization.

13668972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139088 (or 1139086 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 13668972 is about 3697.1572863485. The cubic root of 13668972 is about 239.0994724909.

The spelling of 13668972 in words is "thirteen million, six hundred sixty-eight thousand, nine hundred seventy-two".