89788897 has 6 divisors (see below), whose sum is σ = 98693714. Its totient is φ = 81626160.

The previous prime is 89788891. The next prime is 89788913. The reversal of 89788897 is 79888798.

It can be written as a sum of positive squares in only one way, i.e., 48944016 + 40844881 = 6996^2 + 6391^2 .

It is a de Polignac number, because none of the positive numbers 2^k-89788897 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 (89788891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370908 + ... + 371149.

Almost surely, 2^89788897 is an apocalyptic number.

It is an amenable number.

89788897 is a deficient number, since it is larger than the sum of its proper divisors (8904817).

89788897 is a wasteful number, since it uses less digits than its factorization.

89788897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742079 (or 742068 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 64.

The square root of 89788897 is about 9475.7003435102. The cubic root of 89788897 is about 447.7898159062.

Subtracting from 89788897 its reverse (79888798), we obtain a palindrome (9900099).

The spelling of 89788897 in words is "eighty-nine million, seven hundred eighty-eight thousand, eight hundred ninety-seven".