7979805 has 24 divisors (see below), whose sum is σ = 13897728. Its totient is φ = 4235616.

The previous prime is 7979779. The next prime is 7979813. The reversal of 7979805 is 5089797.

It is not a de Polignac number, because 7979805 - 2⁵ = 7979773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 17004 + ... + 17466.

It is an arithmetic number, because the mean of its divisors is an integer number (579072).

Almost surely, 2^7979805 is an apocalyptic number.

It is an amenable number.

7979805 is a deficient number, since it is larger than the sum of its proper divisors (5917923).

7979805 is a wasteful number, since it uses less digits than its factorization.

7979805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 7979805 is about 2824.8548635284. The cubic root of 7979805 is about 199.8315665240.

The spelling of 7979805 in words is "seven million, nine hundred seventy-nine thousand, eight hundred five".