194088289 has 2 divisors, whose sum is σ = 194088290. Its totient is φ = 194088288.

The previous prime is 194088277. The next prime is 194088299. The reversal of 194088289 is 982880491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156450064 + 37638225 = 12508^2 + 6135^2 .

It is an emirp because it is prime and its reverse (982880491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194088289 - 2⁷ = 194088161 is a prime.

It is not a weakly prime, because it can be changed into another prime (194088259) 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, 97044144 + 97044145.

It is an arithmetic number, because the mean of its divisors is an integer number (97044145).

Almost surely, 2^194088289 is an apocalyptic number.

It is an amenable number.

194088289 is a deficient number, since it is larger than the sum of its proper divisors (1).

194088289 is an equidigital number, since it uses as much as digits as its factorization.

194088289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 194088289 is about 13931.5573070637. The cubic root of 194088289 is about 578.9838420186.

The spelling of 194088289 in words is "one hundred ninety-four million, eighty-eight thousand, two hundred eighty-nine".