193094309 has 2 divisors, whose sum is σ = 193094310. Its totient is φ = 193094308.

The previous prime is 193094303. The next prime is 193094333. The reversal of 193094309 is 903490391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 717409 = 13870^2 + 847^2 .

It is a cyclic number.

It is not a de Polignac number, because 193094309 - 2¹² = 193090213 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 (193094303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96547154 + 96547155.

It is an arithmetic number, because the mean of its divisors is an integer number (96547155).

Almost surely, 2^193094309 is an apocalyptic number.

It is an amenable number.

193094309 is a deficient number, since it is larger than the sum of its proper divisors (1).

193094309 is an equidigital number, since it uses as much as digits as its factorization.

193094309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 193094309 is about 13895.8378300842. The cubic root of 193094309 is about 577.9937709605.

The spelling of 193094309 in words is "one hundred ninety-three million, ninety-four thousand, three hundred nine".