8120889 has 12 divisors (see below), whose sum is σ = 13406016. Its totient is φ = 4640472.

The previous prime is 8120887. The next prime is 8120891. The reversal of 8120889 is 9880218.

It is an interprime number because it is at equal distance from previous prime (8120887) and next prime (8120891).

It is not a de Polignac number, because 8120889 - 2¹ = 8120887 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8120887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64389 + ... + 64514.

It is an arithmetic number, because the mean of its divisors is an integer number (1117168).

Almost surely, 2^8120889 is an apocalyptic number.

It is an amenable number.

8120889 is a deficient number, since it is larger than the sum of its proper divisors (5285127).

8120889 is a wasteful number, since it uses less digits than its factorization.

8120889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128916 (or 128913 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 8120889 is about 2849.7173544055. The cubic root of 8120889 is about 201.0023761507.

It can be divided in two parts, 8120 and 889, that added together give a palindrome (9009).

The spelling of 8120889 in words is "eight million, one hundred twenty thousand, eight hundred eighty-nine".