79809105 has 16 divisors (see below), whose sum is σ = 127816704. Its totient is φ = 42524160.

The previous prime is 79809091. The next prime is 79809137. The reversal of 79809105 is 50190897.

It is a happy number.

It is not a de Polignac number, because 79809105 - 2²² = 75614801 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20257 + ... + 23873.

It is an arithmetic number, because the mean of its divisors is an integer number (7988544).

Almost surely, 2^79809105 is an apocalyptic number.

It is an amenable number.

79809105 is a deficient number, since it is larger than the sum of its proper divisors (48007599).

79809105 is a wasteful number, since it uses less digits than its factorization.

79809105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5096.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 79809105 is about 8933.5941815151. The cubic root of 79809105 is about 430.5439393667.

The spelling of 79809105 in words is "seventy-nine million, eight hundred nine thousand, one hundred five".