1728319493 has 2 divisors, whose sum is σ = 1728319494. Its totient is φ = 1728319492.

The previous prime is 1728319487. The next prime is 1728319499. The reversal of 1728319493 is 3949138271.

It is a balanced prime because it is at equal distance from previous prime (1728319487) and next prime (1728319499).

It can be written as a sum of positive squares in only one way, i.e., 958645444 + 769674049 = 30962^2 + 27743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1728319493 - 2⁸ = 1728319237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1728319499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864159746 + 864159747.

It is an arithmetic number, because the mean of its divisors is an integer number (864159747).

Almost surely, 2^1728319493 is an apocalyptic number.

It is an amenable number.

1728319493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728319493 is an equidigital number, since it uses as much as digits as its factorization.

1728319493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 1728319493 is about 41573.0621075715. The cubic root of 1728319493 is about 1200.0739521554.

The spelling of 1728319493 in words is "one billion, seven hundred twenty-eight million, three hundred nineteen thousand, four hundred ninety-three".