194549993269 has 2 divisors, whose sum is σ = 194549993270. Its totient is φ = 194549993268.

The previous prime is 194549993219. The next prime is 194549993293. The reversal of 194549993269 is 962399945491.

194549993269 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., 179009379025 + 15540614244 = 423095^2 + 124662^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194549993269 is a prime.

It is a super-2 number, since 2×194549993269² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194549993198 and 194549993207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194549993219) 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, 97274996634 + 97274996635.

It is an arithmetic number, because the mean of its divisors is an integer number (97274996635).

Almost surely, 2^194549993269 is an apocalyptic number.

It is an amenable number.

194549993269 is a deficient number, since it is larger than the sum of its proper divisors (1).

194549993269 is an equidigital number, since it uses as much as digits as its factorization.

194549993269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170061120, while the sum is 70.

The spelling of 194549993269 in words is "one hundred ninety-four billion, five hundred forty-nine million, nine hundred ninety-three thousand, two hundred sixty-nine".