17940193 has 2 divisors, whose sum is σ = 17940194. Its totient is φ = 17940192.

The previous prime is 17940163. The next prime is 17940203. The reversal of 17940193 is 39104971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17918289 + 21904 = 4233^2 + 148^2 .

It is an emirp because it is prime and its reverse (39104971) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17940193 is a prime.

It is not a weakly prime, because it can be changed into another prime (17940113) 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, 8970096 + 8970097.

It is an arithmetic number, because the mean of its divisors is an integer number (8970097).

Almost surely, 2^17940193 is an apocalyptic number.

It is an amenable number.

17940193 is a deficient number, since it is larger than the sum of its proper divisors (1).

17940193 is an equidigital number, since it uses as much as digits as its factorization.

17940193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 17940193 is about 4235.5865001201. The cubic root of 17940193 is about 261.7835605401.

The spelling of 17940193 in words is "seventeen million, nine hundred forty thousand, one hundred ninety-three".