163919401 has 2 divisors, whose sum is σ = 163919402. Its totient is φ = 163919400.

The previous prime is 163919387. The next prime is 163919411. The reversal of 163919401 is 104919361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119683600 + 44235801 = 10940^2 + 6651^2 .

It is a cyclic number.

It is not a de Polignac number, because 163919401 - 2⁵ = 163919369 is a prime.

It is a super-3 number, since 3×163919401³ (a number of 26 digits) contains 333 as substring.

It is equal to p_9181933 and since 163919401 and 9181933 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (163919411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81959700 + 81959701.

It is an arithmetic number, because the mean of its divisors is an integer number (81959701).

Almost surely, 2^163919401 is an apocalyptic number.

It is an amenable number.

163919401 is a deficient number, since it is larger than the sum of its proper divisors (1).

163919401 is an equidigital number, since it uses as much as digits as its factorization.

163919401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 163919401 is about 12803.1012258749. The cubic root of 163919401 is about 547.2806830621.

The spelling of 163919401 in words is "one hundred sixty-three million, nine hundred nineteen thousand, four hundred one".