104385639 has 16 divisors (see below), whose sum is σ = 149916800. Its totient is φ = 64393056.

The previous prime is 104385607. The next prime is 104385641. The reversal of 104385639 is 936583401.

It is not a de Polignac number, because 104385639 - 2⁵ = 104385607 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 104385597 and 104385606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104385439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18844 + ... + 23745.

It is an arithmetic number, because the mean of its divisors is an integer number (9369800).

Almost surely, 2^104385639 is an apocalyptic number.

104385639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

104385639 is a deficient number, since it is larger than the sum of its proper divisors (45531161).

104385639 is a wasteful number, since it uses less digits than its factorization.

104385639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42654.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 104385639 is about 10216.9290395891. The cubic root of 104385639 is about 470.8474810552.

The spelling of 104385639 in words is "one hundred four million, three hundred eighty-five thousand, six hundred thirty-nine".