84039143 has 4 divisors (see below), whose sum is σ = 88982640. Its totient is φ = 79095648.

The previous prime is 84039121. The next prime is 84039161. The reversal of 84039143 is 34193048.

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

It is a cyclic number.

It is not a de Polignac number, because 84039143 - 2⁸ = 84038887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84039103) 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 3 ways as a sum of consecutive naturals, for example, 2471723 + ... + 2471756.

It is an arithmetic number, because the mean of its divisors is an integer number (22245660).

Almost surely, 2^84039143 is an apocalyptic number.

84039143 is a deficient number, since it is larger than the sum of its proper divisors (4943497).

84039143 is a wasteful number, since it uses less digits than its factorization.

84039143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943496.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 84039143 is about 9167.2865669183. The cubic root of 84039143 is about 438.0199302177.

The spelling of 84039143 in words is "eighty-four million, thirty-nine thousand, one hundred forty-three".