104861909 has 2 divisors, whose sum is σ = 104861910. Its totient is φ = 104861908.

The previous prime is 104861903. The next prime is 104861921. The reversal of 104861909 is 909168401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90193009 + 14668900 = 9497^2 + 3830^2 .

It is an emirp because it is prime and its reverse (909168401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104861909 - 2¹² = 104857813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104861903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52430954 + 52430955.

It is an arithmetic number, because the mean of its divisors is an integer number (52430955).

Almost surely, 2^104861909 is an apocalyptic number.

It is an amenable number.

104861909 is a deficient number, since it is larger than the sum of its proper divisors (1).

104861909 is an equidigital number, since it uses as much as digits as its factorization.

104861909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 104861909 is about 10240.2103982291. The cubic root of 104861909 is about 471.5624910847.

The spelling of 104861909 in words is "one hundred four million, eight hundred sixty-one thousand, nine hundred nine".