84442019 has 2 divisors, whose sum is σ = 84442020. Its totient is φ = 84442018.

The previous prime is 84441977. The next prime is 84442021. The reversal of 84442019 is 91024448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84442019 - 2²⁴ = 67664803 is a prime.

It is a super-2 number, since 2×84442019² = 14260909145592722, which contains 22 as substring.

Together with 84442021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84442049) 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, 42221009 + 42221010.

It is an arithmetic number, because the mean of its divisors is an integer number (42221010).

Almost surely, 2^84442019 is an apocalyptic number.

84442019 is a deficient number, since it is larger than the sum of its proper divisors (1).

84442019 is an equidigital number, since it uses as much as digits as its factorization.

84442019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 84442019 is about 9189.2338636036. The cubic root of 84442019 is about 438.7187572551.

The spelling of 84442019 in words is "eighty-four million, four hundred forty-two thousand, nineteen".