104181785 has 4 divisors (see below), whose sum is σ = 125018148. Its totient is φ = 83345424.

The previous prime is 104181767. The next prime is 104181821. The reversal of 104181785 is 587181401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587181401 = 307 ⋅1912643.

It can be written as a sum of positive squares in 2 ways, for example, as 14235529 + 89946256 = 3773^2 + 9484^2 .

It is a cyclic number.

It is not a de Polignac number, because 104181785 - 2²⁰ = 103133209 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, 10418174 + ... + 10418183.

It is an arithmetic number, because the mean of its divisors is an integer number (31254537).

Almost surely, 2^104181785 is an apocalyptic number.

It is an amenable number.

104181785 is a deficient number, since it is larger than the sum of its proper divisors (20836363).

104181785 is an equidigital number, since it uses as much as digits as its factorization.

104181785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20836362.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 104181785 is about 10206.9478787736. The cubic root of 104181785 is about 470.5407763735.

The spelling of 104181785 in words is "one hundred four million, one hundred eighty-one thousand, seven hundred eighty-five".