163444019 has 2 divisors, whose sum is σ = 163444020. Its totient is φ = 163444018.

The previous prime is 163444013. The next prime is 163444027. The reversal of 163444019 is 910444361.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (910444361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163444019 is a prime.

It is a super-2 number, since 2×163444019² = 53427894693744722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163444013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81722009 + 81722010.

It is an arithmetic number, because the mean of its divisors is an integer number (81722010).

Almost surely, 2^163444019 is an apocalyptic number.

163444019 is a deficient number, since it is larger than the sum of its proper divisors (1).

163444019 is an equidigital number, since it uses as much as digits as its factorization.

163444019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 163444019 is about 12784.5226348112. The cubic root of 163444019 is about 546.7511152917.

The spelling of 163444019 in words is "one hundred sixty-three million, four hundred forty-four thousand, nineteen".