89727561 has 32 divisors (see below), whose sum is σ = 165734400. Its totient is φ = 46610640.

The previous prime is 89727529. The next prime is 89727563. The reversal of 89727561 is 16572798.

89727561 is a `hidden beast` number, since 89 + 7 + 2 + 7 + 561 = 666.

It is not a de Polignac number, because 89727561 - 2⁵ = 89727529 is a prime.

It is a super-3 number, since 3×89727561³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89727563) 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 31 ways as a sum of consecutive naturals, for example, 19501 + ... + 23658.

It is an arithmetic number, because the mean of its divisors is an integer number (5179200).

Almost surely, 2^89727561 is an apocalyptic number.

It is an amenable number.

89727561 is a deficient number, since it is larger than the sum of its proper divisors (76006839).

89727561 is a wasteful number, since it uses less digits than its factorization.

89727561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43186 (or 43180 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 89727561 is about 9472.4633015916. The cubic root of 89727561 is about 447.6878289364.

The spelling of 89727561 in words is "eighty-nine million, seven hundred twenty-seven thousand, five hundred sixty-one".