84043993 has 4 divisors (see below), whose sum is σ = 91684368. Its totient is φ = 76403620.

The previous prime is 84043963. The next prime is 84044003. The reversal of 84043993 is 39934048.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84043993 - 2²⁵ = 50489561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84043933) 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, 3820171 + ... + 3820192.

It is an arithmetic number, because the mean of its divisors is an integer number (22921092).

Almost surely, 2^84043993 is an apocalyptic number.

It is an amenable number.

84043993 is a deficient number, since it is larger than the sum of its proper divisors (7640375).

84043993 is a wasteful number, since it uses less digits than its factorization.

84043993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640374.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 84043993 is about 9167.5510906676. The cubic root of 84043993 is about 438.0283562746.

The spelling of 84043993 in words is "eighty-four million, forty-three thousand, nine hundred ninety-three".