14688981 has 6 divisors (see below), whose sum is σ = 21217430. Its totient is φ = 9792648.

The previous prime is 14688979. The next prime is 14688991. The reversal of 14688981 is 18988641.

It can be written as a sum of positive squares in only one way, i.e., 13024881 + 1664100 = 3609^2 + 1290^2 .

It is not a de Polignac number, because 14688981 - 2¹ = 14688979 is a prime.

It is a super-2 number, since 2×14688981² = 431532325636722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14688931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 816046 + ... + 816063.

Almost surely, 2^14688981 is an apocalyptic number.

It is an amenable number.

14688981 is a deficient number, since it is larger than the sum of its proper divisors (6528449).

14688981 is a wasteful number, since it uses less digits than its factorization.

14688981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632115 (or 1632112 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 14688981 is about 3832.6206438937. The cubic root of 14688981 is about 244.9047582045.

The spelling of 14688981 in words is "fourteen million, six hundred eighty-eight thousand, nine hundred eighty-one".