163840043 has 2 divisors, whose sum is σ = 163840044. Its totient is φ = 163840042.

The previous prime is 163840007. The next prime is 163840049. The reversal of 163840043 is 340048361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163840043 - 2¹⁸ = 163577899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163839988 and 163840015.

It is not a weakly prime, because it can be changed into another prime (163840049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81920021 + 81920022.

It is an arithmetic number, because the mean of its divisors is an integer number (81920022).

Almost surely, 2^163840043 is an apocalyptic number.

163840043 is a deficient number, since it is larger than the sum of its proper divisors (1).

163840043 is an equidigital number, since it uses as much as digits as its factorization.

163840043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 163840043 is about 12800.0016796874. The cubic root of 163840043 is about 547.1923508070.

The spelling of 163840043 in words is "one hundred sixty-three million, eight hundred forty thousand, forty-three".