89172287 has 4 divisors (see below), whose sum is σ = 89192400. Its totient is φ = 89152176.

The previous prime is 89172283. The next prime is 89172299. The reversal of 89172287 is 78227198.

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

It is a cyclic number.

It is not a de Polignac number, because 89172287 - 2² = 89172283 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 (89172283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158 + ... + 13355.

It is an arithmetic number, because the mean of its divisors is an integer number (22298100).

Almost surely, 2^89172287 is an apocalyptic number.

89172287 is a deficient number, since it is larger than the sum of its proper divisors (20113).

89172287 is a wasteful number, since it uses less digits than its factorization.

89172287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20112.

The product of its digits is 112896, while the sum is 44.

The square root of 89172287 is about 9443.1079100051. The cubic root of 89172287 is about 446.7624203145.

The spelling of 89172287 in words is "eighty-nine million, one hundred seventy-two thousand, two hundred eighty-seven".