84324389 has 2 divisors, whose sum is σ = 84324390. Its totient is φ = 84324388.

The previous prime is 84324379. The next prime is 84324397. The reversal of 84324389 is 98342348.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83576164 + 748225 = 9142^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 84324389 - 2⁸ = 84324133 is a prime.

It is a super-2 number, since 2×84324389² = 14221205160446642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84324379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42162194 + 42162195.

It is an arithmetic number, because the mean of its divisors is an integer number (42162195).

Almost surely, 2^84324389 is an apocalyptic number.

It is an amenable number.

84324389 is a deficient number, since it is larger than the sum of its proper divisors (1).

84324389 is an equidigital number, since it uses as much as digits as its factorization.

84324389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The square root of 84324389 is about 9182.8312082930. The cubic root of 84324389 is about 438.5149469181.

It can be divided in two parts, 8432 and 4389, that added together give a palindrome (12821).

The spelling of 84324389 in words is "eighty-four million, three hundred twenty-four thousand, three hundred eighty-nine".