104390309 has 2 divisors, whose sum is σ = 104390310. Its totient is φ = 104390308.

The previous prime is 104390303. The next prime is 104390323. The reversal of 104390309 is 903093401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100200100 + 4190209 = 10010^2 + 2047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104390309 is a prime.

It is a super-2 number, since 2×104390309² = 21794673226230962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104390303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52195154 + 52195155.

It is an arithmetic number, because the mean of its divisors is an integer number (52195155).

Almost surely, 2^104390309 is an apocalyptic number.

It is an amenable number.

104390309 is a deficient number, since it is larger than the sum of its proper divisors (1).

104390309 is an equidigital number, since it uses as much as digits as its factorization.

104390309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 104390309 is about 10217.1575792879. The cubic root of 104390309 is about 470.8545025349.

The spelling of 104390309 in words is "one hundred four million, three hundred ninety thousand, three hundred nine".