89128959 has 4 divisors (see below), whose sum is σ = 118838616. Its totient is φ = 59419304.

The previous prime is 89128939. The next prime is 89128997. The reversal of 89128959 is 95982198.

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 89128959 - 2⁹ = 89128447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89128939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14854824 + ... + 14854829.

It is an arithmetic number, because the mean of its divisors is an integer number (29709654).

Almost surely, 2^89128959 is an apocalyptic number.

89128959 is a deficient number, since it is larger than the sum of its proper divisors (29709657).

89128959 is a wasteful number, since it uses less digits than its factorization.

89128959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29709656.

The product of its digits is 466560, while the sum is 51.

The square root of 89128959 is about 9440.8134713064. The cubic root of 89128959 is about 446.6900493316.

It can be divided in two parts, 8912 and 8959, that added together give a palindrome (17871).

The spelling of 89128959 in words is "eighty-nine million, one hundred twenty-eight thousand, nine hundred fifty-nine".