14691981 has 8 divisors (see below), whose sum is σ = 20067264. Its totient is φ = 9555680.

The previous prime is 14691979. The next prime is 14691983. The reversal of 14691981 is 18919641.

It is an interprime number because it is at equal distance from previous prime (14691979) and next prime (14691983).

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 14691981 - 2¹ = 14691979 is a prime.

It is a super-2 number, since 2×14691981² = 431708611408722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14691983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59601 + ... + 59846.

It is an arithmetic number, because the mean of its divisors is an integer number (2508408).

Almost surely, 2^14691981 is an apocalyptic number.

It is an amenable number.

14691981 is a deficient number, since it is larger than the sum of its proper divisors (5375283).

14691981 is a wasteful number, since it uses less digits than its factorization.

14691981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119491.

The product of its digits is 15552, while the sum is 39.

The square root of 14691981 is about 3833.0120010248. The cubic root of 14691981 is about 244.9214297549.

The spelling of 14691981 in words is "fourteen million, six hundred ninety-one thousand, nine hundred eighty-one".