84440143 has 2 divisors, whose sum is σ = 84440144. Its totient is φ = 84440142.

The previous prime is 84440131. The next prime is 84440159. The reversal of 84440143 is 34104448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84440143 - 2²⁵ = 50885711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84440243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42220071 + 42220072.

It is an arithmetic number, because the mean of its divisors is an integer number (42220072).

Almost surely, 2^84440143 is an apocalyptic number.

84440143 is a deficient number, since it is larger than the sum of its proper divisors (1).

84440143 is an equidigital number, since it uses as much as digits as its factorization.

84440143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 84440143 is about 9189.1317870624. The cubic root of 84440143 is about 438.7155083098.

The spelling of 84440143 in words is "eighty-four million, four hundred forty thousand, one hundred forty-three".