85539143 has 2 divisors, whose sum is σ = 85539144. Its totient is φ = 85539142.

The previous prime is 85539127. The next prime is 85539149. The reversal of 85539143 is 34193558.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85539143 - 2⁴ = 85539127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85539097 and 85539106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85539149) 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 as a sum of consecutive naturals, namely, 42769571 + 42769572.

It is an arithmetic number, because the mean of its divisors is an integer number (42769572).

Almost surely, 2^85539143 is an apocalyptic number.

85539143 is a deficient number, since it is larger than the sum of its proper divisors (1).

85539143 is an equidigital number, since it uses as much as digits as its factorization.

85539143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The square root of 85539143 is about 9248.7373732851. The cubic root of 85539143 is about 440.6106243017.

The spelling of 85539143 in words is "eighty-five million, five hundred thirty-nine thousand, one hundred forty-three".