89666573 has 4 divisors (see below), whose sum is σ = 89688060. Its totient is φ = 89645088.

The previous prime is 89666543. The next prime is 89666597. The reversal of 89666573 is 37566698.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52736644 + 36929929 = 7262^2 + 6077^2 .

It is a cyclic number.

It is not a de Polignac number, because 89666573 - 2¹⁰ = 89665549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89666543) 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 3 ways as a sum of consecutive naturals, for example, 2240 + ... + 13577.

It is an arithmetic number, because the mean of its divisors is an integer number (22422015).

Almost surely, 2^89666573 is an apocalyptic number.

It is an amenable number.

89666573 is a deficient number, since it is larger than the sum of its proper divisors (21487).

89666573 is a wasteful number, since it uses less digits than its factorization.

89666573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21486.

The product of its digits is 1632960, while the sum is 50.

The square root of 89666573 is about 9469.2435283923. The cubic root of 89666573 is about 447.5863745136.

The spelling of 89666573 in words is "eighty-nine million, six hundred sixty-six thousand, five hundred seventy-three".