104187905 has 4 divisors (see below), whose sum is σ = 125025492. Its totient is φ = 83350320.

The previous prime is 104187871. The next prime is 104187911. The reversal of 104187905 is 509781401.

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 60575089 + 43612816 = 7783^2 + 6604^2 .

It is not a de Polignac number, because 104187905 - 2¹⁰ = 104186881 is a prime.

It is a Duffinian 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, 10418786 + ... + 10418795.

It is an arithmetic number, because the mean of its divisors is an integer number (31256373).

Almost surely, 2^104187905 is an apocalyptic number.

It is an amenable number.

104187905 is a deficient number, since it is larger than the sum of its proper divisors (20837587).

104187905 is an equidigital number, since it uses as much as digits as its factorization.

104187905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20837586.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 104187905 is about 10207.2476701606. The cubic root of 104187905 is about 470.5499899264.

The spelling of 104187905 in words is "one hundred four million, one hundred eighty-seven thousand, nine hundred five".