1728345803 has 2 divisors, whose sum is σ = 1728345804. Its totient is φ = 1728345802.

The previous prime is 1728345793. The next prime is 1728345863. The reversal of 1728345803 is 3085438271.

It is a weak prime.

It is an emirp because it is prime and its reverse (3085438271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1728345803 - 2¹⁴ = 1728329419 is a prime.

It is not a weakly prime, because it can be changed into another prime (1728345863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864172901 + 864172902.

It is an arithmetic number, because the mean of its divisors is an integer number (864172902).

Almost surely, 2^1728345803 is an apocalyptic number.

1728345803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728345803 is an equidigital number, since it uses as much as digits as its factorization.

1728345803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 1728345803 is about 41573.3785372322. The cubic root of 1728345803 is about 1200.0800416517.

The spelling of 1728345803 in words is "one billion, seven hundred twenty-eight million, three hundred forty-five thousand, eight hundred three".