1728731743 has 4 divisors (see below), whose sum is σ = 1744030368. Its totient is φ = 1713433120.

The previous prime is 1728731713. The next prime is 1728731783. The reversal of 1728731743 is 3471378271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1728731743 - 2⁹ = 1728731231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1728731743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728731713) 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 in 3 ways as a sum of consecutive naturals, for example, 7649143 + ... + 7649368.

It is an arithmetic number, because the mean of its divisors is an integer number (436007592).

Almost surely, 2^1728731743 is an apocalyptic number.

1728731743 is a deficient number, since it is larger than the sum of its proper divisors (15298625).

1728731743 is a wasteful number, since it uses less digits than its factorization.

1728731743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15298624.

The product of its digits is 197568, while the sum is 43.

The square root of 1728731743 is about 41578.0199504498. The cubic root of 1728731743 is about 1200.1693610499.

The spelling of 1728731743 in words is "one billion, seven hundred twenty-eight million, seven hundred thirty-one thousand, seven hundred forty-three".