84078619 has 2 divisors, whose sum is σ = 84078620. Its totient is φ = 84078618.

The previous prime is 84078607. The next prime is 84078703. The reversal of 84078619 is 91687048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84078619 - 2⁵ = 84078587 is a prime.

It is a super-2 number, since 2×84078619² = 14138428345894322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84078919) 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, 42039309 + 42039310.

It is an arithmetic number, because the mean of its divisors is an integer number (42039310).

Almost surely, 2^84078619 is an apocalyptic number.

84078619 is a deficient number, since it is larger than the sum of its proper divisors (1).

84078619 is an equidigital number, since it uses as much as digits as its factorization.

84078619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 84078619 is about 9169.4394048928. The cubic root of 84078619 is about 438.0885036920.

The spelling of 84078619 in words is "eighty-four million, seventy-eight thousand, six hundred nineteen".