104782109 has 4 divisors (see below), whose sum is σ = 104802816. Its totient is φ = 104761404.

The previous prime is 104782091. The next prime is 104782123. The reversal of 104782109 is 901287401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104782109 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 (104782159) 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, 2852 + ... + 14754.

It is an arithmetic number, because the mean of its divisors is an integer number (26200704).

Almost surely, 2^104782109 is an apocalyptic number.

It is an amenable number.

104782109 is a deficient number, since it is larger than the sum of its proper divisors (20707).

104782109 is an equidigital number, since it uses as much as digits as its factorization.

104782109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20706.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 104782109 is about 10236.3132523385. The cubic root of 104782109 is about 471.4428409123.

The spelling of 104782109 in words is "one hundred four million, seven hundred eighty-two thousand, one hundred nine".