172573603 has 4 divisors (see below), whose sum is σ = 173136040. Its totient is φ = 172011168.

The previous prime is 172573601. The next prime is 172573607. The reversal of 172573603 is 306375271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306375271 = 14657 ⋅20903.

It is a cyclic number.

It is not a de Polignac number, because 172573603 - 2¹ = 172573601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172573601) 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, 280758 + ... + 281371.

It is an arithmetic number, because the mean of its divisors is an integer number (43284010).

Almost surely, 2^172573603 is an apocalyptic number.

172573603 is a deficient number, since it is larger than the sum of its proper divisors (562437).

172573603 is an equidigital number, since it uses as much as digits as its factorization.

172573603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562436.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 172573603 is about 13136.7272560558. The cubic root of 172573603 is about 556.7473033095.

The spelling of 172573603 in words is "one hundred seventy-two million, five hundred seventy-three thousand, six hundred three".