89989213 has 4 divisors (see below), whose sum is σ = 91464508. Its totient is φ = 88513920.

The previous prime is 89989199. The next prime is 89989223. The reversal of 89989213 is 31298998.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36216324 + 53772889 = 6018^2 + 7333^2 .

It is a cyclic number.

It is not a de Polignac number, because 89989213 - 2²¹ = 87892061 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 (89989223) 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, 737556 + ... + 737677.

It is an arithmetic number, because the mean of its divisors is an integer number (22866127).

Almost surely, 2^89989213 is an apocalyptic number.

It is an amenable number.

89989213 is a deficient number, since it is larger than the sum of its proper divisors (1475295).

89989213 is a wasteful number, since it uses less digits than its factorization.

89989213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475294.

The product of its digits is 279936, while the sum is 49.

The square root of 89989213 is about 9486.2644386502. The cubic root of 89989213 is about 448.1225698985.

The spelling of 89989213 in words is "eighty-nine million, nine hundred eighty-nine thousand, two hundred thirteen".