163445743 has 4 divisors (see below), whose sum is σ = 166923360. Its totient is φ = 159968128.

The previous prime is 163445731. The next prime is 163445747. The reversal of 163445743 is 347544361.

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

It is a cyclic number.

It is not a de Polignac number, because 163445743 - 2⁹ = 163445231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163445747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738738 + ... + 1738831.

It is an arithmetic number, because the mean of its divisors is an integer number (41730840).

Almost surely, 2^163445743 is an apocalyptic number.

163445743 is a deficient number, since it is larger than the sum of its proper divisors (3477617).

163445743 is an equidigital number, since it uses as much as digits as its factorization.

163445743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477616.

The product of its digits is 120960, while the sum is 37.

The square root of 163445743 is about 12784.5900599120. The cubic root of 163445743 is about 546.7530376535.

The spelling of 163445743 in words is "one hundred sixty-three million, four hundred forty-five thousand, seven hundred forty-three".