84681143 has 2 divisors, whose sum is σ = 84681144. Its totient is φ = 84681142.

The previous prime is 84681133. The next prime is 84681209. The reversal of 84681143 is 34118648.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84681143 - 2¹⁰ = 84680119 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_4926293 and since 84681143 and 4926293 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84681133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42340571 + 42340572.

It is an arithmetic number, because the mean of its divisors is an integer number (42340572).

Almost surely, 2^84681143 is an apocalyptic number.

84681143 is a deficient number, since it is larger than the sum of its proper divisors (1).

84681143 is an equidigital number, since it uses as much as digits as its factorization.

84681143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 35.

The square root of 84681143 is about 9202.2357609442. The cubic root of 84681143 is about 439.1324901101.

The spelling of 84681143 in words is "eighty-four million, six hundred eighty-one thousand, one hundred forty-three".