163194869 has 2 divisors, whose sum is σ = 163194870. Its totient is φ = 163194868.

The previous prime is 163194859. The next prime is 163194923. The reversal of 163194869 is 968491361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138344644 + 24850225 = 11762^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 163194869 - 2⁴ = 163194853 is a prime.

It is a super-2 number, since 2×163194869² = 53265130535854322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163194809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81597434 + 81597435.

It is an arithmetic number, because the mean of its divisors is an integer number (81597435).

Almost surely, 2^163194869 is an apocalyptic number.

It is an amenable number.

163194869 is a deficient number, since it is larger than the sum of its proper divisors (1).

163194869 is an equidigital number, since it uses as much as digits as its factorization.

163194869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 163194869 is about 12774.7747142562. The cubic root of 163194869 is about 546.4731560691.

The spelling of 163194869 in words is "one hundred sixty-three million, one hundred ninety-four thousand, eight hundred sixty-nine".