104080805 has 4 divisors (see below), whose sum is σ = 124896972. Its totient is φ = 83264640.

The previous prime is 104080799. The next prime is 104080807. The reversal of 104080805 is 508080401.

It is a Cunningham number, because it is equal to 10202²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37478884 + 66601921 = 6122^2 + 8161^2 .

It is not a de Polignac number, because 104080805 - 2⁸ = 104080549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104080807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10408076 + ... + 10408085.

It is an arithmetic number, because the mean of its divisors is an integer number (31224243).

Almost surely, 2^104080805 is an apocalyptic number.

It is an amenable number.

104080805 is a deficient number, since it is larger than the sum of its proper divisors (20816167).

104080805 is an equidigital number, since it uses as much as digits as its factorization.

104080805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20816166.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 104080805 is about 10202.0000490100. Note that the first 4 decimals coincide. The cubic root of 104080805 is about 470.3887006292.

The spelling of 104080805 in words is "one hundred four million, eighty thousand, eight hundred five".