194806289 has 2 divisors, whose sum is σ = 194806290. Its totient is φ = 194806288.

The previous prime is 194806279. The next prime is 194806307. The reversal of 194806289 is 982608491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160782400 + 34023889 = 12680^2 + 5833^2 .

It is a cyclic number.

It is not a de Polignac number, because 194806289 - 2⁸ = 194806033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194806279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97403144 + 97403145.

It is an arithmetic number, because the mean of its divisors is an integer number (97403145).

Almost surely, 2^194806289 is an apocalyptic number.

It is an amenable number.

194806289 is a deficient number, since it is larger than the sum of its proper divisors (1).

194806289 is an equidigital number, since it uses as much as digits as its factorization.

194806289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 194806289 is about 13957.3023539651. The cubic root of 194806289 is about 579.6969175518.

The spelling of 194806289 in words is "one hundred ninety-four million, eight hundred six thousand, two hundred eighty-nine".