8719989 has 4 divisors (see below), whose sum is σ = 11626656. Its totient is φ = 5813324.

The previous prime is 8719987. The next prime is 8719999. The reversal of 8719989 is 9899178.

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 8719989 - 2¹ = 8719987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8719987) 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, 1453329 + ... + 1453334.

It is an arithmetic number, because the mean of its divisors is an integer number (2906664).

Almost surely, 2^8719989 is an apocalyptic number.

It is an amenable number.

8719989 is a deficient number, since it is larger than the sum of its proper divisors (2906667).

8719989 is a wasteful number, since it uses less digits than its factorization.

8719989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906666.

The product of its digits is 326592, while the sum is 51.

The square root of 8719989 is about 2952.9627495111. The cubic root of 8719989 is about 205.8284067656.

The spelling of 8719989 in words is "eight million, seven hundred nineteen thousand, nine hundred eighty-nine".