194422132309 has 2 divisors, whose sum is σ = 194422132310. Its totient is φ = 194422132308.

The previous prime is 194422132279. The next prime is 194422132319. The reversal of 194422132309 is 903231224491.

It is a happy number.

194422132309 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., 130933251409 + 63488880900 = 361847^2 + 251970^2 .

It is a cyclic number.

It is not a de Polignac number, because 194422132309 - 2¹¹ = 194422130261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194422132319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97211066154 + 97211066155.

It is an arithmetic number, because the mean of its divisors is an integer number (97211066155).

Almost surely, 2^194422132309 is an apocalyptic number.

It is an amenable number.

194422132309 is a deficient number, since it is larger than the sum of its proper divisors (1).

194422132309 is an equidigital number, since it uses as much as digits as its factorization.

194422132309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 194422132309 in words is "one hundred ninety-four billion, four hundred twenty-two million, one hundred thirty-two thousand, three hundred nine".