1745728573 has 4 divisors (see below), whose sum is σ = 1805926140. Its totient is φ = 1685531008.

The previous prime is 1745728553. The next prime is 1745728583. The reversal of 1745728573 is 3758275471.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1374703929 + 371024644 = 37077^2 + 19262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1745728573 - 2¹⁷ = 1745597501 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1745728553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30098740 + ... + 30098797.

It is an arithmetic number, because the mean of its divisors is an integer number (451481535).

Almost surely, 2^1745728573 is an apocalyptic number.

It is an amenable number.

1745728573 is a deficient number, since it is larger than the sum of its proper divisors (60197567).

1745728573 is an equidigital number, since it uses as much as digits as its factorization.

1745728573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60197566.

The product of its digits is 1646400, while the sum is 49.

The square root of 1745728573 is about 41781.9168181643. The cubic root of 1745728573 is about 1204.0898812327.

The spelling of 1745728573 in words is "one billion, seven hundred forty-five million, seven hundred twenty-eight thousand, five hundred seventy-three".