84219854 has 4 divisors (see below), whose sum is σ = 126329784. Its totient is φ = 42109926.

The previous prime is 84219847. The next prime is 84219931. The reversal of 84219854 is 45891248.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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, 21054962 + ... + 21054965.

It is an arithmetic number, because the mean of its divisors is an integer number (31582446).

Almost surely, 2^84219854 is an apocalyptic number.

84219854 is a deficient number, since it is larger than the sum of its proper divisors (42109930).

84219854 is a wasteful number, since it uses less digits than its factorization.

84219854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42109929.

The product of its digits is 92160, while the sum is 41.

The square root of 84219854 is about 9177.1375711602. The cubic root of 84219854 is about 438.3336663660. Note that the first 3 decimals are identical.

The spelling of 84219854 in words is "eighty-four million, two hundred nineteen thousand, eight hundred fifty-four".