104217805 has 4 divisors (see below), whose sum is σ = 125061372. Its totient is φ = 83374240.

The previous prime is 104217797. The next prime is 104217821. The reversal of 104217805 is 508712401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508712401 = 1973 ⋅257837.

It can be written as a sum of positive squares in 2 ways, for example, as 72284004 + 31933801 = 8502^2 + 5651^2 .

It is not a de Polignac number, because 104217805 - 2³ = 104217797 is a prime.

It is a super-2 number, since 2×104217805² = 21722701758036050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10421776 + ... + 10421785.

It is an arithmetic number, because the mean of its divisors is an integer number (31265343).

Almost surely, 2^104217805 is an apocalyptic number.

It is an amenable number.

104217805 is a deficient number, since it is larger than the sum of its proper divisors (20843567).

104217805 is an equidigital number, since it uses as much as digits as its factorization.

104217805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20843566.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 104217805 is about 10208.7122106562. The cubic root of 104217805 is about 470.5949986666.

The spelling of 104217805 in words is "one hundred four million, two hundred seventeen thousand, eight hundred five".