1728732823 has 2 divisors, whose sum is σ = 1728732824. Its totient is φ = 1728732822.

The previous prime is 1728732793. The next prime is 1728732847. The reversal of 1728732823 is 3282378271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1728732823 - 2²¹ = 1726635671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1728732823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1728732883) 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, 864366411 + 864366412.

It is an arithmetic number, because the mean of its divisors is an integer number (864366412).

Almost surely, 2^1728732823 is an apocalyptic number.

1728732823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728732823 is an equidigital number, since it uses as much as digits as its factorization.

1728732823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 43.

The square root of 1728732823 is about 41578.0329380792. The cubic root of 1728732823 is about 1200.1696109793.

The spelling of 1728732823 in words is "one billion, seven hundred twenty-eight million, seven hundred thirty-two thousand, eight hundred twenty-three".