84039089 has 2 divisors, whose sum is σ = 84039090. Its totient is φ = 84039088.

The previous prime is 84039083. The next prime is 84039091. The reversal of 84039089 is 98093048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43296400 + 40742689 = 6580^2 + 6383^2 .

It is a cyclic number.

It is not a de Polignac number, because 84039089 - 2¹⁶ = 83973553 is a prime.

It is a Sophie Germain prime.

Together with 84039091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84039083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42019544 + 42019545.

It is an arithmetic number, because the mean of its divisors is an integer number (42019545).

Almost surely, 2^84039089 is an apocalyptic number.

It is an amenable number.

84039089 is a deficient number, since it is larger than the sum of its proper divisors (1).

84039089 is an equidigital number, since it uses as much as digits as its factorization.

84039089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 84039089 is about 9167.2836216624. The cubic root of 84039089 is about 438.0198364000.

Adding to 84039089 its sum of digits (41), we get a triangular number (84039130 = T₁₂₉₆₄).

The spelling of 84039089 in words is "eighty-four million, thirty-nine thousand, eighty-nine".