13269981 has 8 divisors (see below), whose sum is σ = 18027360. Its totient is φ = 8679632.

The previous prime is 13269973. The next prime is 13269983. The reversal of 13269981 is 18996231.

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 13269981 - 2³ = 13269973 is a prime.

It is a super-2 number, since 2×13269981² = 352184791480722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13269983) 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, 41571 + ... + 41888.

It is an arithmetic number, because the mean of its divisors is an integer number (2253420).

Almost surely, 2^13269981 is an apocalyptic number.

It is an amenable number.

13269981 is a deficient number, since it is larger than the sum of its proper divisors (4757379).

13269981 is an equidigital number, since it uses as much as digits as its factorization.

13269981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83515.

The product of its digits is 23328, while the sum is 39.

The square root of 13269981 is about 3642.7985121332. The cubic root of 13269981 is about 236.7500614215.

The spelling of 13269981 in words is "thirteen million, two hundred sixty-nine thousand, nine hundred eighty-one".