89879985 has 24 divisors (see below), whose sum is σ = 167777064. Its totient is φ = 44248320.

The previous prime is 89879971. The next prime is 89879989. The reversal of 89879985 is 58997898.

It can be written as a sum of positive squares in 4 ways, for example, as 5992704 + 83887281 = 2448^2 + 9159^2 .

It is not a de Polignac number, because 89879985 - 2⁶ = 89879921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89879989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76236 + ... + 77405.

It is an arithmetic number, because the mean of its divisors is an integer number (6990711).

Almost surely, 2^89879985 is an apocalyptic number.

It is an amenable number.

89879985 is a deficient number, since it is larger than the sum of its proper divisors (77897079).

89879985 is a wasteful number, since it uses less digits than its factorization.

89879985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153665 (or 153662 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 63.

The square root of 89879985 is about 9480.5055244960. The cubic root of 89879985 is about 447.9411876054.

The spelling of 89879985 in words is "eighty-nine million, eight hundred seventy-nine thousand, nine hundred eighty-five".