8813989 has 4 divisors (see below), whose sum is σ = 8820940. Its totient is φ = 8807040.

The previous prime is 8813983. The next prime is 8813993. The reversal of 8813989 is 9893188.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2772225 + 6041764 = 1665^2 + 2458^2 .

It is a cyclic number.

It is not a de Polignac number, because 8813989 - 2²¹ = 6716837 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 (8813983) 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, 972 + ... + 4309.

It is an arithmetic number, because the mean of its divisors is an integer number (2205235).

Almost surely, 2^8813989 is an apocalyptic number.

It is an amenable number.

8813989 is a deficient number, since it is larger than the sum of its proper divisors (6951).

8813989 is a wasteful number, since it uses less digits than its factorization.

8813989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6950.

The product of its digits is 124416, while the sum is 46.

The square root of 8813989 is about 2968.8363040087. The cubic root of 8813989 is about 206.5653634051.

The spelling of 8813989 in words is "eight million, eight hundred thirteen thousand, nine hundred eighty-nine".