85707539 has 8 divisors (see below), whose sum is σ = 87622080. Its totient is φ = 83811816.

The previous prime is 85707533. The next prime is 85707569. The reversal of 85707539 is 93570758.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85707539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85707539.

It is not an unprimeable number, because it can be changed into a prime (85707533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4712 + ... + 13914.

It is an arithmetic number, because the mean of its divisors is an integer number (10952760).

Almost surely, 2^85707539 is an apocalyptic number.

85707539 is a deficient number, since it is larger than the sum of its proper divisors (1914541).

85707539 is a wasteful number, since it uses less digits than its factorization.

85707539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9409.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 85707539 is about 9257.8366263399. The cubic root of 85707539 is about 440.8995697213.

The spelling of 85707539 in words is "eighty-five million, seven hundred seven thousand, five hundred thirty-nine".