79847985 has 16 divisors (see below), whose sum is σ = 146007936. Its totient is φ = 36501888.

The previous prime is 79847983. The next prime is 79847993. The reversal of 79847985 is 58974897.

It is not a de Polignac number, because 79847985 - 2¹ = 79847983 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79847983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380124 + ... + 380333.

It is an arithmetic number, because the mean of its divisors is an integer number (9125496).

Almost surely, 2^79847985 is an apocalyptic number.

It is an amenable number.

79847985 is a deficient number, since it is larger than the sum of its proper divisors (66159951).

79847985 is a wasteful number, since it uses less digits than its factorization.

79847985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760472.

The product of its digits is 5080320, while the sum is 57.

The square root of 79847985 is about 8935.7699724198. The cubic root of 79847985 is about 430.6138429648.

The spelling of 79847985 in words is "seventy-nine million, eight hundred forty-seven thousand, nine hundred eighty-five".