163443641 has 4 divisors (see below), whose sum is σ = 163600500. Its totient is φ = 163286784.

The previous prime is 163443617. The next prime is 163443659. The reversal of 163443641 is 146344361.

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 67305616 + 96138025 = 8204^2 + 9805^2 .

It is a cyclic number.

It is not a de Polignac number, because 163443641 - 2¹⁸ = 163181497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163443598 and 163443607.

It is not an unprimeable number, because it can be changed into a prime (163443601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76856 + ... + 78953.

It is an arithmetic number, because the mean of its divisors is an integer number (40900125).

Almost surely, 2^163443641 is an apocalyptic number.

It is an amenable number.

163443641 is a deficient number, since it is larger than the sum of its proper divisors (156859).

163443641 is a wasteful number, since it uses less digits than its factorization.

163443641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156858.

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

The square root of 163443641 is about 12784.5078513019. The cubic root of 163443641 is about 546.7506937976.

The spelling of 163443641 in words is "one hundred sixty-three million, four hundred forty-three thousand, six hundred forty-one".