193952009 has 2 divisors, whose sum is σ = 193952010. Its totient is φ = 193952008.

The previous prime is 193951969. The next prime is 193952023. The reversal of 193952009 is 900259391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143328784 + 50623225 = 11972^2 + 7115^2 .

It is a cyclic number.

It is not a de Polignac number, because 193952009 - 2²⁰ = 192903433 is a prime.

It is not a weakly prime, because it can be changed into another prime (193952309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96976004 + 96976005.

It is an arithmetic number, because the mean of its divisors is an integer number (96976005).

Almost surely, 2^193952009 is an apocalyptic number.

It is an amenable number.

193952009 is a deficient number, since it is larger than the sum of its proper divisors (1).

193952009 is an equidigital number, since it uses as much as digits as its factorization.

193952009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 193952009 is about 13926.6653941279. The cubic root of 193952009 is about 578.8482982185.

The spelling of 193952009 in words is "one hundred ninety-three million, nine hundred fifty-two thousand, nine".