163444361 has 4 divisors (see below), whose sum is σ = 165062724. Its totient is φ = 161826000.

The previous prime is 163444297. The next prime is 163444451.

163444361 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66520336 + 96924025 = 8156^2 + 9845^2 .

It is a cyclic number.

It is not a de Polignac number, because 163444361 - 2⁶ = 163444297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163444861) 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 in 3 ways as a sum of consecutive naturals, for example, 809030 + ... + 809231.

It is an arithmetic number, because the mean of its divisors is an integer number (41265681).

Almost surely, 2^163444361 is an apocalyptic number.

It is an amenable number.

163444361 is a deficient number, since it is larger than the sum of its proper divisors (1618363).

163444361 is a wasteful number, since it uses less digits than its factorization.

163444361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618362.

The product of its digits is 20736, while the sum is 32.

The square root of 163444361 is about 12784.5360103525. The cubic root of 163444361 is about 546.7514966430.

The spelling of 163444361 in words is "one hundred sixty-three million, four hundred forty-four thousand, three hundred sixty-one".