104249309 has 2 divisors, whose sum is σ = 104249310. Its totient is φ = 104249308.

The previous prime is 104249297. The next prime is 104249323. The reversal of 104249309 is 903942401.

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., 65772100 + 38477209 = 8110^2 + 6203^2 .

It is a cyclic number.

It is not a de Polignac number, because 104249309 - 2⁴ = 104249293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104249209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52124654 + 52124655.

It is an arithmetic number, because the mean of its divisors is an integer number (52124655).

Almost surely, 2^104249309 is an apocalyptic number.

It is an amenable number.

104249309 is a deficient number, since it is larger than the sum of its proper divisors (1).

104249309 is an equidigital number, since it uses as much as digits as its factorization.

104249309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 104249309 is about 10210.2550898594. The cubic root of 104249309 is about 470.6424126096.

The spelling of 104249309 in words is "one hundred four million, two hundred forty-nine thousand, three hundred nine".