1728345863 has 2 divisors, whose sum is σ = 1728345864. Its totient is φ = 1728345862.

The previous prime is 1728345803. The next prime is 1728345923. The reversal of 1728345863 is 3685438271.

It is a balanced prime because it is at equal distance from previous prime (1728345803) and next prime (1728345923).

It is a cyclic number.

It is not a de Polignac number, because 1728345863 - 2¹⁶ = 1728280327 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 (1728345803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864172931 + 864172932.

It is an arithmetic number, because the mean of its divisors is an integer number (864172932).

Almost surely, 2^1728345863 is an apocalyptic number.

1728345863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728345863 is an equidigital number, since it uses as much as digits as its factorization.

1728345863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 47.

The square root of 1728345863 is about 41573.3792588478. The cubic root of 1728345863 is about 1200.0800555388.

The spelling of 1728345863 in words is "one billion, seven hundred twenty-eight million, three hundred forty-five thousand, eight hundred sixty-three".