85195979 has 18 divisors (see below), whose sum is σ = 97967268. Its totient is φ = 74083460.

The previous prime is 85195961. The next prime is 85195987. The reversal of 85195979 is 97959158.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 85195979 - 2⁸ = 85195723 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 85195979.

It is not an unprimeable number, because it can be changed into a prime (85195919) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3704162 + ... + 3704184.

It is an arithmetic number, because the mean of its divisors is an integer number (5442626).

Almost surely, 2^85195979 is an apocalyptic number.

85195979 is a deficient number, since it is larger than the sum of its proper divisors (12771289).

85195979 is an frugal number, since it uses more digits than its factorization.

85195979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 34 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 53.

The square root of 85195979 is about 9230.1667915591. The cubic root of 85195979 is about 440.0206240333.

The spelling of 85195979 in words is "eighty-five million, one hundred ninety-five thousand, nine hundred seventy-nine".