84321889 has 2 divisors, whose sum is σ = 84321890. Its totient is φ = 84321888.

The previous prime is 84321869. The next prime is 84321899. The reversal of 84321889 is 98812348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82901025 + 1420864 = 9105^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 84321889 - 2⁵ = 84321857 is a prime.

It is a super-2 number, since 2×84321889² = 14220361929056642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84321859) 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, 42160944 + 42160945.

It is an arithmetic number, because the mean of its divisors is an integer number (42160945).

Almost surely, 2^84321889 is an apocalyptic number.

It is an amenable number.

84321889 is a deficient number, since it is larger than the sum of its proper divisors (1).

84321889 is an equidigital number, since it uses as much as digits as its factorization.

84321889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 43.

The square root of 84321889 is about 9182.6950836887. The cubic root of 84321889 is about 438.5106132640.

The spelling of 84321889 in words is "eighty-four million, three hundred twenty-one thousand, eight hundred eighty-nine".