89489989 has 8 divisors (see below), whose sum is σ = 96308568. Its totient is φ = 82844160.

The previous prime is 89489951. The next prime is 89489993. The reversal of 89489989 is 98998498.

It can be written as a sum of positive squares in 4 ways, for example, as 187489 + 89302500 = 433^2 + 9450^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89489989 - 2⁷ = 89489861 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 89489989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89489909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42112 + ... + 44185.

It is an arithmetic number, because the mean of its divisors is an integer number (12038571).

Almost surely, 2^89489989 is an apocalyptic number.

It is an amenable number.

89489989 is a deficient number, since it is larger than the sum of its proper divisors (6818579).

89489989 is a wasteful number, since it uses less digits than its factorization.

89489989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86375.

The product of its digits is 13436928, while the sum is 64.

The square root of 89489989 is about 9459.9148516253. The cubic root of 89489989 is about 447.2923647919.

The spelling of 89489989 in words is "eighty-nine million, four hundred eighty-nine thousand, nine hundred eighty-nine".