89490823 has 4 divisors (see below), whose sum is σ = 91673568. Its totient is φ = 87308080.

The previous prime is 89490809. The next prime is 89490847. The reversal of 89490823 is 32809498.

It is a happy number.

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 89490823 - 2⁹ = 89490311 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 89490823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89490803) 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 3 ways as a sum of consecutive naturals, for example, 1091311 + ... + 1091392.

It is an arithmetic number, because the mean of its divisors is an integer number (22918392).

Almost surely, 2^89490823 is an apocalyptic number.

89490823 is a deficient number, since it is larger than the sum of its proper divisors (2182745).

89490823 is a wasteful number, since it uses less digits than its factorization.

89490823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182744.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 89490823 is about 9459.9589322576. The cubic root of 89490823 is about 447.2937542981.

The spelling of 89490823 in words is "eighty-nine million, four hundred ninety thousand, eight hundred twenty-three".