89661573 has 20 divisors (see below), whose sum is σ = 134780448. Its totient is φ = 59398920.

The previous prime is 89661557. The next prime is 89661577. The reversal of 89661573 is 37516698.

It is a happy number.

It is not a de Polignac number, because 89661573 - 2⁴ = 89661557 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89661577) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9808 + ... + 16598.

Almost surely, 2^89661573 is an apocalyptic number.

It is an amenable number.

89661573 is a deficient number, since it is larger than the sum of its proper divisors (45118875).

89661573 is a wasteful number, since it uses less digits than its factorization.

89661573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966 (or 6957 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 89661573 is about 9468.9795120699. The cubic root of 89661573 is about 447.5780549009.

The spelling of 89661573 in words is "eighty-nine million, six hundred sixty-one thousand, five hundred seventy-three".