194918593 has 2 divisors, whose sum is σ = 194918594. Its totient is φ = 194918592.

The previous prime is 194918569. The next prime is 194918609. The reversal of 194918593 is 395819491.

194918593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184633744 + 10284849 = 13588^2 + 3207^2 .

It is an emirp because it is prime and its reverse (395819491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194918593 - 2⁵ = 194918561 is a prime.

It is not a weakly prime, because it can be changed into another prime (194918393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97459296 + 97459297.

It is an arithmetic number, because the mean of its divisors is an integer number (97459297).

Almost surely, 2^194918593 is an apocalyptic number.

It is an amenable number.

194918593 is a deficient number, since it is larger than the sum of its proper divisors (1).

194918593 is an equidigital number, since it uses as much as digits as its factorization.

194918593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 49.

The square root of 194918593 is about 13961.3249013122. The cubic root of 194918593 is about 579.8082927657.

The spelling of 194918593 in words is "one hundred ninety-four million, nine hundred eighteen thousand, five hundred ninety-three".