8688981 has 16 divisors (see below), whose sum is σ = 13392000. Its totient is φ = 4908288.

The previous prime is 8688961. The next prime is 8688991. The reversal of 8688981 is 1898868.

It is not a de Polignac number, because 8688981 - 2⁹ = 8688469 is a prime.

It is a super-2 number, since 2×8688981² = 150996781636722, which contains 22 as substring.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 8688981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8688961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456 + ... + 4193.

It is an arithmetic number, because the mean of its divisors is an integer number (837000).

Almost surely, 2^8688981 is an apocalyptic number.

It is an amenable number.

8688981 is a deficient number, since it is larger than the sum of its proper divisors (4703019).

8688981 is a wasteful number, since it uses less digits than its factorization.

8688981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4748.

The product of its digits is 221184, while the sum is 48.

The square root of 8688981 is about 2947.7077534925. The cubic root of 8688981 is about 205.5841439447.

It can be divided in two parts, 8688 and 981, that added together give a palindrome (9669).

The spelling of 8688981 in words is "eight million, six hundred eighty-eight thousand, nine hundred eighty-one".