163927919 has 2 divisors, whose sum is σ = 163927920. Its totient is φ = 163927918.

The previous prime is 163927909. The next prime is 163927927. The reversal of 163927919 is 919729361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163927919 - 2⁴ = 163927903 is a prime.

It is a super-2 number, since 2×163927919² = 53744725255341122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163927909) 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, 81963959 + 81963960.

It is an arithmetic number, because the mean of its divisors is an integer number (81963960).

Almost surely, 2^163927919 is an apocalyptic number.

163927919 is a deficient number, since it is larger than the sum of its proper divisors (1).

163927919 is an equidigital number, since it uses as much as digits as its factorization.

163927919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 47.

The square root of 163927919 is about 12803.4338753320. The cubic root of 163927919 is about 547.2901626317.

The spelling of 163927919 in words is "one hundred sixty-three million, nine hundred twenty-seven thousand, nine hundred nineteen".