1728207601 has 4 divisors (see below), whose sum is σ = 1733429104. Its totient is φ = 1722986100.

The previous prime is 1728207599. The next prime is 1728207617. The reversal of 1728207601 is 1067028271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1067028271 = 571 ⋅1868701.

It is a cyclic number.

It is not a de Polignac number, because 1728207601 - 2¹ = 1728207599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1728207631) 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, 2610255 + ... + 2610916.

It is an arithmetic number, because the mean of its divisors is an integer number (433357276).

Almost surely, 2^1728207601 is an apocalyptic number.

It is an amenable number.

1728207601 is a deficient number, since it is larger than the sum of its proper divisors (5221503).

1728207601 is an equidigital number, since it uses as much as digits as its factorization.

1728207601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221502.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1728207601 is about 41571.7163586013. The cubic root of 1728207601 is about 1200.0480538627.

The spelling of 1728207601 in words is "one billion, seven hundred twenty-eight million, two hundred seven thousand, six hundred one".