89988689 has 4 divisors (see below), whose sum is σ = 102844224. Its totient is φ = 77133156.

The previous prime is 89988671. The next prime is 89988697. The reversal of 89988689 is 98688998.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 89988689 - 2⁸ = 89988433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89988659) 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, 6427757 + ... + 6427770.

It is an arithmetic number, because the mean of its divisors is an integer number (25711056).

Almost surely, 2^89988689 is an apocalyptic number.

It is an amenable number.

89988689 is a deficient number, since it is larger than the sum of its proper divisors (12855535).

89988689 is a wasteful number, since it uses less digits than its factorization.

89988689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12855534.

The product of its digits is 17915904, while the sum is 65.

The square root of 89988689 is about 9486.2368197299. The cubic root of 89988689 is about 448.1217001029.

The spelling of 89988689 in words is "eighty-nine million, nine hundred eighty-eight thousand, six hundred eighty-nine".