104409509 has 2 divisors, whose sum is σ = 104409510. Its totient is φ = 104409508.

The previous prime is 104409499. The next prime is 104409533. The reversal of 104409509 is 905904401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68145025 + 36264484 = 8255^2 + 6022^2 .

It is a cyclic number.

It is not a de Polignac number, because 104409509 - 2¹⁶ = 104343973 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 (104409709) 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, 52204754 + 52204755.

It is an arithmetic number, because the mean of its divisors is an integer number (52204755).

Almost surely, 2^104409509 is an apocalyptic number.

It is an amenable number.

104409509 is a deficient number, since it is larger than the sum of its proper divisors (1).

104409509 is an equidigital number, since it uses as much as digits as its factorization.

104409509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 104409509 is about 10218.0971320496. The cubic root of 104409509 is about 470.8833680888.

The spelling of 104409509 in words is "one hundred four million, four hundred nine thousand, five hundred nine".