89508681 has 6 divisors (see below), whose sum is σ = 129290330. Its totient is φ = 59672448.

The previous prime is 89508667. The next prime is 89508697. The reversal of 89508681 is 18680598.

89508681 is a `hidden beast` number, since 89 + 508 + 68 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 78057225 + 11451456 = 8835^2 + 3384^2 .

It is not a de Polignac number, because 89508681 - 2⁹ = 89508169 is a prime.

It is a super-2 number, since 2×89508681² = 16023607948719522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89508641) 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, 4972696 + ... + 4972713.

Almost surely, 2^89508681 is an apocalyptic number.

It is an amenable number.

89508681 is a deficient number, since it is larger than the sum of its proper divisors (39781649).

89508681 is a wasteful number, since it uses less digits than its factorization.

89508681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9945415 (or 9945412 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 89508681 is about 9460.9027581939. The cubic root of 89508681 is about 447.3235049858.

The spelling of 89508681 in words is "eighty-nine million, five hundred eight thousand, six hundred eighty-one".