1728163 has 2 divisors, whose sum is σ = 1728164. Its totient is φ = 1728162.

The previous prime is 1728149. The next prime is 1728179. The reversal of 1728163 is 3618271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1728163 - 2¹⁷ = 1597091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1728193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864081 + 864082.

It is an arithmetic number, because the mean of its divisors is an integer number (864082).

2^1728163 is an apocalyptic number.

1728163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728163 is an equidigital number, since it uses as much as digits as its factorization.

1728163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 1728163 is about 1314.5961357010. The cubic root of 1728163 is about 120.0037730295.

It can be divided in two parts, 1728 and 163, that added together give a triangular number (1891 = T₆₁).

The spelling of 1728163 in words is "one million, seven hundred twenty-eight thousand, one hundred sixty-three".