104639 has 2 divisors, whose sum is σ = 104640. Its totient is φ = 104638.

The previous prime is 104623. The next prime is 104651. The reversal of 104639 is 936401.

It is a strong prime.

It is an emirp because it is prime and its reverse (936401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104639 - 2⁴ = 104623 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52319 + 52320.

It is an arithmetic number, because the mean of its divisors is an integer number (52320).

2¹⁰⁴⁶³⁹ is an apocalyptic number.

104639 is a deficient number, since it is larger than the sum of its proper divisors (1).

104639 is an equidigital number, since it uses as much as digits as its factorization.

104639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 104639 is about 323.4795202173. The cubic root of 104639 is about 47.1228114522.

The spelling of 104639 in words is "one hundred four thousand, six hundred thirty-nine".