1728738023 has 2 divisors, whose sum is σ = 1728738024. Its totient is φ = 1728738022.

The previous prime is 1728738019. The next prime is 1728738031. The reversal of 1728738023 is 3208378271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1728738023 - 2² = 1728738019 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1728738223) 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, 864369011 + 864369012.

It is an arithmetic number, because the mean of its divisors is an integer number (864369012).

Almost surely, 2^1728738023 is an apocalyptic number.

1728738023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728738023 is an equidigital number, since it uses as much as digits as its factorization.

1728738023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 1728738023 is about 41578.0954710530. The cubic root of 1728738023 is about 1200.1708143416.

The spelling of 1728738023 in words is "one billion, seven hundred twenty-eight million, seven hundred thirty-eight thousand, twenty-three".