84428119 has 2 divisors, whose sum is σ = 84428120. Its totient is φ = 84428118.

The previous prime is 84428083. The next prime is 84428129. The reversal of 84428119 is 91182448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84428119 - 2⁷ = 84427991 is a prime.

It is a super-3 number, since 3×84428119³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84428129) 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, 42214059 + 42214060.

It is an arithmetic number, because the mean of its divisors is an integer number (42214060).

Almost surely, 2^84428119 is an apocalyptic number.

84428119 is a deficient number, since it is larger than the sum of its proper divisors (1).

84428119 is an equidigital number, since it uses as much as digits as its factorization.

84428119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 37.

The square root of 84428119 is about 9188.4775126242. The cubic root of 84428119 is about 438.6946834372.

It can be divided in two parts, 8442 and 8119, that added together give a palindrome (16561).

The spelling of 84428119 in words is "eighty-four million, four hundred twenty-eight thousand, one hundred nineteen".