163441643 has 2 divisors, whose sum is σ = 163441644. Its totient is φ = 163441642.

The previous prime is 163441627. The next prime is 163441661. The reversal of 163441643 is 346144361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163441643 - 2⁴ = 163441627 is a prime.

It is not a weakly prime, because it can be changed into another prime (163441673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81720821 + 81720822.

It is an arithmetic number, because the mean of its divisors is an integer number (81720822).

Almost surely, 2^163441643 is an apocalyptic number.

163441643 is a deficient number, since it is larger than the sum of its proper divisors (1).

163441643 is an equidigital number, since it uses as much as digits as its factorization.

163441643 is an evil number, because the sum of its binary digits is even.

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

The square root of 163441643 is about 12784.4297096116. The cubic root of 163441643 is about 546.7484658893.

The spelling of 163441643 in words is "one hundred sixty-three million, four hundred forty-one thousand, six hundred forty-three".