163440743 has 2 divisors, whose sum is σ = 163440744. Its totient is φ = 163440742.

The previous prime is 163440733. The next prime is 163440749. The reversal of 163440743 is 347044361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163440743 - 2¹⁶ = 163375207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163440749) 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 as a sum of consecutive naturals, namely, 81720371 + 81720372.

It is an arithmetic number, because the mean of its divisors is an integer number (81720372).

Almost surely, 2^163440743 is an apocalyptic number.

163440743 is a deficient number, since it is larger than the sum of its proper divisors (1).

163440743 is an equidigital number, since it uses as much as digits as its factorization.

163440743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 163440743 is about 12784.3945104960. The cubic root of 163440743 is about 546.7474623211.

The spelling of 163440743 in words is "one hundred sixty-three million, four hundred forty thousand, seven hundred forty-three".