89568981 has 12 divisors (see below), whose sum is σ = 132130752. Its totient is φ = 58441896.

The previous prime is 89568967. The next prime is 89568991. The reversal of 89568981 is 18986598.

It is not a de Polignac number, because 89568981 - 2⁵ = 89568949 is a prime.

It is a super-2 number, since 2×89568981² = 16045204714756722, 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 (89568901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105451 + ... + 106296.

It is an arithmetic number, because the mean of its divisors is an integer number (11010896).

Almost surely, 2^89568981 is an apocalyptic number.

It is an amenable number.

89568981 is a deficient number, since it is larger than the sum of its proper divisors (42561771).

89568981 is a wasteful number, since it uses less digits than its factorization.

89568981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211800 (or 211797 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 89568981 is about 9464.0890211367. The cubic root of 89568981 is about 447.4239330566.

The spelling of 89568981 in words is "eighty-nine million, five hundred sixty-eight thousand, nine hundred eighty-one".