84391994 has 16 divisors (see below), whose sum is σ = 128887200. Its totient is φ = 41433744.

The previous prime is 84391963. The next prime is 84391997. The reversal of 84391994 is 49919348.

It is not an unprimeable number, because it can be changed into a prime (84391997) 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 in 7 ways as a sum of consecutive naturals, for example, 51317 + ... + 52935.

It is an arithmetic number, because the mean of its divisors is an integer number (8055450).

Almost surely, 2^84391994 is an apocalyptic number.

84391994 is a deficient number, since it is larger than the sum of its proper divisors (44495206).

84391994 is a wasteful number, since it uses less digits than its factorization.

84391994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077.

The product of its digits is 279936, while the sum is 47.

The square root of 84391994 is about 9186.5115250567. The cubic root of 84391994 is about 438.6321051300.

The spelling of 84391994 in words is "eighty-four million, three hundred ninety-one thousand, nine hundred ninety-four".