104219309 has 2 divisors, whose sum is σ = 104219310. Its totient is φ = 104219308.

The previous prime is 104219263. The next prime is 104219317. The reversal of 104219309 is 903912401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104142025 + 77284 = 10205^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 104219309 - 2⁸ = 104219053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104219329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52109654 + 52109655.

It is an arithmetic number, because the mean of its divisors is an integer number (52109655).

Almost surely, 2^104219309 is an apocalyptic number.

It is an amenable number.

104219309 is a deficient number, since it is larger than the sum of its proper divisors (1).

104219309 is an equidigital number, since it uses as much as digits as its factorization.

104219309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 104219309 is about 10208.7858729626. The cubic root of 104219309 is about 470.5972624240.

The spelling of 104219309 in words is "one hundred four million, two hundred nineteen thousand, three hundred nine".