85707679 has 4 divisors (see below), whose sum is σ = 85878576. Its totient is φ = 85536784.

The previous prime is 85707647. The next prime is 85707697. The reversal of 85707679 is 97670758.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85707679 - 2⁵ = 85707647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85707619) 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 in 3 ways as a sum of consecutive naturals, for example, 84694 + ... + 85699.

It is an arithmetic number, because the mean of its divisors is an integer number (21469644).

Almost surely, 2^85707679 is an apocalyptic number.

85707679 is a deficient number, since it is larger than the sum of its proper divisors (170897).

85707679 is a wasteful number, since it uses less digits than its factorization.

85707679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170896.

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 85707679 is about 9257.8441874985. The cubic root of 85707679 is about 440.8998097854.

The spelling of 85707679 in words is "eighty-five million, seven hundred seven thousand, six hundred seventy-nine".