84043994 has 4 divisors (see below), whose sum is σ = 126065994. Its totient is φ = 42021996.

The previous prime is 84043963. The next prime is 84044003. The reversal of 84043994 is 49934048.

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

It can be written as a sum of positive squares in only one way, i.e., 79477225 + 4566769 = 8915^2 + 2137^2 .

It is an unprimeable number.

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, 21010997 + ... + 21011000.

Almost surely, 2^84043994 is an apocalyptic number.

84043994 is a deficient number, since it is larger than the sum of its proper divisors (42022000).

84043994 is a wasteful number, since it uses less digits than its factorization.

84043994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42021999.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 84043994 is about 9167.5511452078. The cubic root of 84043994 is about 438.0283580119.

The spelling of 84043994 in words is "eighty-four million, forty-three thousand, nine hundred ninety-four".