85195779 has 16 divisors (see below), whose sum is σ = 115657248. Its totient is φ = 55775232.

The previous prime is 85195777. The next prime is 85195807. The reversal of 85195779 is 97759158.

It is not a de Polignac number, because 85195779 - 2¹ = 85195777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85195777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38799 + ... + 40935.

It is an arithmetic number, because the mean of its divisors is an integer number (7228578).

Almost surely, 2^85195779 is an apocalyptic number.

85195779 is a deficient number, since it is larger than the sum of its proper divisors (30461469).

85195779 is a wasteful number, since it uses less digits than its factorization.

85195779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374.

The product of its digits is 793800, while the sum is 51.

The square root of 85195779 is about 9230.1559575123. The cubic root of 85195779 is about 440.0202797127.

The spelling of 85195779 in words is "eighty-five million, one hundred ninety-five thousand, seven hundred seventy-nine".