89987173 has 8 divisors (see below), whose sum is σ = 96022400. Its totient is φ = 84081888.

The previous prime is 89987147. The next prime is 89987237. The reversal of 89987173 is 37178998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89987173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89987173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89987123) 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 7 ways as a sum of consecutive naturals, for example, 31053 + ... + 33826.

It is an arithmetic number, because the mean of its divisors is an integer number (12002800).

Almost surely, 2^89987173 is an apocalyptic number.

It is an amenable number.

89987173 is a deficient number, since it is larger than the sum of its proper divisors (6035227).

89987173 is a wasteful number, since it uses less digits than its factorization.

89987173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64971.

The product of its digits is 762048, while the sum is 52.

The square root of 89987173 is about 9486.1569141565. The cubic root of 89987173 is about 448.1191836521.

The spelling of 89987173 in words is "eighty-nine million, nine hundred eighty-seven thousand, one hundred seventy-three".