84316789 has 2 divisors, whose sum is σ = 84316790. Its totient is φ = 84316788.

The previous prime is 84316783. The next prime is 84316801. The reversal of 84316789 is 98761348.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73702225 + 10614564 = 8585^2 + 3258^2 .

It is a cyclic number.

It is not a de Polignac number, because 84316789 - 2¹⁵ = 84284021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84316783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42158394 + 42158395.

It is an arithmetic number, because the mean of its divisors is an integer number (42158395).

Almost surely, 2^84316789 is an apocalyptic number.

It is an amenable number.

84316789 is a deficient number, since it is larger than the sum of its proper divisors (1).

84316789 is an equidigital number, since it uses as much as digits as its factorization.

84316789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 84316789 is about 9182.4173832385. The cubic root of 84316789 is about 438.5017723440.

The spelling of 84316789 in words is "eighty-four million, three hundred sixteen thousand, seven hundred eighty-nine".