84108019 has 2 divisors, whose sum is σ = 84108020. Its totient is φ = 84108018.

The previous prime is 84107977. The next prime is 84108029. The reversal of 84108019 is 91080148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84108019 - 2¹⁷ = 83976947 is a prime.

It is a super-2 number, since 2×84108019² = 14148317720208722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84108029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42054009 + 42054010.

It is an arithmetic number, because the mean of its divisors is an integer number (42054010).

Almost surely, 2^84108019 is an apocalyptic number.

84108019 is a deficient number, since it is larger than the sum of its proper divisors (1).

84108019 is an equidigital number, since it uses as much as digits as its factorization.

84108019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 84108019 is about 9171.0424162142. The cubic root of 84108019 is about 438.1395602754.

The spelling of 84108019 in words is "eighty-four million, one hundred eight thousand, nineteen".