104345209 has 2 divisors, whose sum is σ = 104345210. Its totient is φ = 104345208.

The previous prime is 104345203. The next prime is 104345231. The reversal of 104345209 is 902543401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58064400 + 46280809 = 7620^2 + 6803^2 .

It is an emirp because it is prime and its reverse (902543401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104345209 - 2⁵ = 104345177 is a prime.

It is not a weakly prime, because it can be changed into another prime (104345203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52172604 + 52172605.

It is an arithmetic number, because the mean of its divisors is an integer number (52172605).

Almost surely, 2^104345209 is an apocalyptic number.

It is an amenable number.

104345209 is a deficient number, since it is larger than the sum of its proper divisors (1).

104345209 is an equidigital number, since it uses as much as digits as its factorization.

104345209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 104345209 is about 10214.9502690909. The cubic root of 104345209 is about 470.7866846275.

The spelling of 104345209 in words is "one hundred four million, three hundred forty-five thousand, two hundred nine".