84091998 has 8 divisors (see below), whose sum is σ = 168184008. Its totient is φ = 28030664.

The previous prime is 84091991. The next prime is 84091999. The reversal of 84091998 is 89919048.

It is a sphenic number, since it is the product of 3 distinct primes.

84091998 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84091991) 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 in 3 ways as a sum of consecutive naturals, for example, 7007661 + ... + 7007672.

It is an arithmetic number, because the mean of its divisors is an integer number (21023001).

Almost surely, 2^84091998 is an apocalyptic number.

84091998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84091998 is a wasteful number, since it uses less digits than its factorization.

84091998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14015338.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 84091998 is about 9170.1689188368. The cubic root of 84091998 is about 438.1117393862. Note that the first 3 decimals are identical.

The spelling of 84091998 in words is "eighty-four million, ninety-one thousand, nine hundred ninety-eight".