84207089 has 4 divisors (see below), whose sum is σ = 85795956. Its totient is φ = 82618224.

The previous prime is 84207041. The next prime is 84207119. The reversal of 84207089 is 98070248.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67108864 + 17098225 = 8192^2 + 4135^2 .

It is a cyclic number.

It is not a de Polignac number, because 84207089 - 2²⁰ = 83158513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84207589) 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, 794354 + ... + 794459.

It is an arithmetic number, because the mean of its divisors is an integer number (21448989).

Almost surely, 2^84207089 is an apocalyptic number.

It is an amenable number.

84207089 is a deficient number, since it is larger than the sum of its proper divisors (1588867).

84207089 is a wasteful number, since it uses less digits than its factorization.

84207089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588866.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 84207089 is about 9176.4420665092. The cubic root of 84207089 is about 438.3115195218.

The spelling of 84207089 in words is "eighty-four million, two hundred seven thousand, eighty-nine".