85560779 has 4 divisors (see below), whose sum is σ = 90593784. Its totient is φ = 80527776.

The previous prime is 85560757. The next prime is 85560791. The reversal of 85560779 is 97706558.

It is a happy number.

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

It is not a de Polignac number, because 85560779 - 2⁸ = 85560523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85560719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2516477 + ... + 2516510.

It is an arithmetic number, because the mean of its divisors is an integer number (22648446).

Almost surely, 2^85560779 is an apocalyptic number.

85560779 is a deficient number, since it is larger than the sum of its proper divisors (5033005).

85560779 is a wasteful number, since it uses less digits than its factorization.

85560779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5033004.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 85560779 is about 9249.9069725052. The cubic root of 85560779 is about 440.6477700555.

The spelling of 85560779 in words is "eighty-five million, five hundred sixty thousand, seven hundred seventy-nine".