1728746029 has 2 divisors, whose sum is σ = 1728746030. Its totient is φ = 1728746028.

The previous prime is 1728746011. The next prime is 1728746053. The reversal of 1728746029 is 9206478271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 968641129 + 760104900 = 31123^2 + 27570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1728746029 - 2⁷ = 1728745901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1728746029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1728746429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864373014 + 864373015.

It is an arithmetic number, because the mean of its divisors is an integer number (864373015).

Almost surely, 2^1728746029 is an apocalyptic number.

It is an amenable number.

1728746029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728746029 is an equidigital number, since it uses as much as digits as its factorization.

1728746029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 1728746029 is about 41578.1917475977. The cubic root of 1728746029 is about 1200.1726670520.

The spelling of 1728746029 in words is "one billion, seven hundred twenty-eight million, seven hundred forty-six thousand, twenty-nine".