8319989 has 4 divisors (see below), whose sum is σ = 8326656. Its totient is φ = 8313324.

The previous prime is 8319977. The next prime is 8320001. The reversal of 8319989 is 9899138.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (8319977) and next prime (8320001).

It is a cyclic number.

It is not a de Polignac number, because 8319989 - 2⁸ = 8319733 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 (8319959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839 + ... + 4164.

It is an arithmetic number, because the mean of its divisors is an integer number (2081664).

Almost surely, 2^8319989 is an apocalyptic number.

It is an amenable number.

8319989 is a deficient number, since it is larger than the sum of its proper divisors (6667).

8319989 is a wasteful number, since it uses less digits than its factorization.

8319989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666.

The product of its digits is 139968, while the sum is 47.

The square root of 8319989 is about 2884.4391135886. The cubic root of 8319989 is about 202.6317914631.

The spelling of 8319989 in words is "eight million, three hundred nineteen thousand, nine hundred eighty-nine".