8889989 has 4 divisors (see below), whose sum is σ = 9106860. Its totient is φ = 8673120.

The previous prime is 8889977. The next prime is 8890039. The reversal of 8889989 is 9899888.

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 1144900 + 7745089 = 1070^2 + 2783^2 .

It is a cyclic number.

It is not a de Polignac number, because 8889989 - 2⁴ = 8889973 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 (8889889) 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 3 ways as a sum of consecutive naturals, for example, 108374 + ... + 108455.

It is an arithmetic number, because the mean of its divisors is an integer number (2276715).

Almost surely, 2^8889989 is an apocalyptic number.

It is an amenable number.

8889989 is a deficient number, since it is larger than the sum of its proper divisors (216871).

8889989 is a wasteful number, since it uses less digits than its factorization.

8889989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216870.

The product of its digits is 2985984, while the sum is 59.

The square root of 8889989 is about 2981.6084585337. The cubic root of 8889989 is about 207.1573791302.

It can be divided in two parts, 88899 and 89, that added together give a palindrome (88988).

The spelling of 8889989 in words is "eight million, eight hundred eighty-nine thousand, nine hundred eighty-nine".