85439141 has 2 divisors, whose sum is σ = 85439142. Its totient is φ = 85439140.

The previous prime is 85439119. The next prime is 85439153. The reversal of 85439141 is 14193458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79727041 + 5712100 = 8929^2 + 2390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85439141 is a prime.

It is a Chen prime.

It is equal to p_4967801 and since 85439141 and 4967801 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 (85439111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42719570 + 42719571.

It is an arithmetic number, because the mean of its divisors is an integer number (42719571).

Almost surely, 2^85439141 is an apocalyptic number.

It is an amenable number.

85439141 is a deficient number, since it is larger than the sum of its proper divisors (1).

85439141 is an equidigital number, since it uses as much as digits as its factorization.

85439141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 85439141 is about 9243.3295408094. The cubic root of 85439141 is about 440.4388544979.

The spelling of 85439141 in words is "eighty-five million, four hundred thirty-nine thousand, one hundred forty-one".