84427143 has 16 divisors (see below), whose sum is σ = 114316800. Its totient is φ = 55417824.

The previous prime is 84427141. The next prime is 84427153. The reversal of 84427143 is 34172448.

It is not a de Polignac number, because 84427143 - 2¹ = 84427141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84427141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60805 + ... + 62177.

It is an arithmetic number, because the mean of its divisors is an integer number (7144800).

Almost surely, 2^84427143 is an apocalyptic number.

84427143 is a deficient number, since it is larger than the sum of its proper divisors (29889657).

84427143 is a wasteful number, since it uses less digits than its factorization.

84427143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678.

The product of its digits is 21504, while the sum is 33.

The square root of 84427143 is about 9188.4244024751. The cubic root of 84427143 is about 438.6929929749.

The spelling of 84427143 in words is "eighty-four million, four hundred twenty-seven thousand, one hundred forty-three".