84089889 has 12 divisors (see below), whose sum is σ = 130806676. Its totient is φ = 51747552.

The previous prime is 84089881. The next prime is 84089911. The reversal of 84089889 is 98898048.

It can be written as a sum of positive squares in 2 ways, for example, as 6350400 + 77739489 = 2520^2 + 8817^2 .

It is not a de Polignac number, because 84089889 - 2³ = 84089881 is a prime.

It is a super-2 number, since 2×84089889² = 14142218864064642, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84089881) 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, 359242 + ... + 359475.

Almost surely, 2^84089889 is an apocalyptic number.

It is an amenable number.

84089889 is a deficient number, since it is larger than the sum of its proper divisors (46716787).

84089889 is a wasteful number, since it uses less digits than its factorization.

84089889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718736 (or 718733 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The square root of 84089889 is about 9170.0539256866. The cubic root of 84089889 is about 438.1080767888.

The spelling of 84089889 in words is "eighty-four million, eighty-nine thousand, eight hundred eighty-nine".