13168981 has 8 divisors (see below), whose sum is σ = 15257024. Its totient is φ = 11132640.

The previous prime is 13168943. The next prime is 13169021. The reversal of 13168981 is 18986131.

13168981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13168981 - 2⁷ = 13168853 is a prime.

It is a super-2 number, since 2×13168981² = 346844121156722, which contains 22 as substring.

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 13168981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13168901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12375 + ... + 13396.

It is an arithmetic number, because the mean of its divisors is an integer number (1907128).

Almost surely, 2^13168981 is an apocalyptic number.

It is an amenable number.

13168981 is a deficient number, since it is larger than the sum of its proper divisors (2088043).

13168981 is an equidigital number, since it uses as much as digits as its factorization.

13168981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25851.

The product of its digits is 10368, while the sum is 37.

The square root of 13168981 is about 3628.9090647190. The cubic root of 13168981 is about 236.1478832304.

The spelling of 13168981 in words is "thirteen million, one hundred sixty-eight thousand, nine hundred eighty-one".