85874143 has 2 divisors, whose sum is σ = 85874144. Its totient is φ = 85874142.

The previous prime is 85874141. The next prime is 85874147. The reversal of 85874143 is 34147858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85874143 - 2¹ = 85874141 is a prime.

Together with 85874141, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 85874096 and 85874105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85874141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42937071 + 42937072.

It is an arithmetic number, because the mean of its divisors is an integer number (42937072).

Almost surely, 2^85874143 is an apocalyptic number.

85874143 is a deficient number, since it is larger than the sum of its proper divisors (1).

85874143 is an equidigital number, since it uses as much as digits as its factorization.

85874143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

The square root of 85874143 is about 9266.8302563498. The cubic root of 85874143 is about 441.1850680883.

The spelling of 85874143 in words is "eighty-five million, eight hundred seventy-four thousand, one hundred forty-three".