85170539 has 2 divisors, whose sum is σ = 85170540. Its totient is φ = 85170538.

The previous prime is 85170517. The next prime is 85170551. The reversal of 85170539 is 93507158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85170539 - 2¹² = 85166443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85170509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42585269 + 42585270.

It is an arithmetic number, because the mean of its divisors is an integer number (42585270).

Almost surely, 2^85170539 is an apocalyptic number.

85170539 is a deficient number, since it is larger than the sum of its proper divisors (1).

85170539 is an equidigital number, since it uses as much as digits as its factorization.

85170539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 85170539 is about 9228.7885987274. The cubic root of 85170539 is about 439.9768221262.

The spelling of 85170539 in words is "eighty-five million, one hundred seventy thousand, five hundred thirty-nine".