89547561 has 24 divisors (see below), whose sum is σ = 134291456. Its totient is φ = 57438720.

The previous prime is 89547529. The next prime is 89547569. The reversal of 89547561 is 16574598.

89547561 is a `hidden beast` number, since 89 + 5 + 4 + 7 + 561 = 666.

It is not a de Polignac number, because 89547561 - 2⁵ = 89547529 is a prime.

It is a Duffinian number.

Its product of digits (302400) is a multiple of the sum of its prime divisors (1890).

It is not an unprimeable number, because it can be changed into a prime (89547569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53016 + ... + 54678.

Almost surely, 2^89547561 is an apocalyptic number.

It is an amenable number.

89547561 is a deficient number, since it is larger than the sum of its proper divisors (44743895).

89547561 is a wasteful number, since it uses less digits than its factorization.

89547561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893 (or 1890 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 89547561 is about 9462.9573073115. The cubic root of 89547561 is about 447.3882637709.

The spelling of 89547561 in words is "eighty-nine million, five hundred forty-seven thousand, five hundred sixty-one".