172573601 has 2 divisors, whose sum is σ = 172573602. Its totient is φ = 172573600.

The previous prime is 172573591. The next prime is 172573607. The reversal of 172573601 is 106375271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162588001 + 9985600 = 12751^2 + 3160^2 .

It is an emirp because it is prime and its reverse (106375271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172573601 - 2⁶ = 172573537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172573607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86286800 + 86286801.

It is an arithmetic number, because the mean of its divisors is an integer number (86286801).

Almost surely, 2^172573601 is an apocalyptic number.

It is an amenable number.

172573601 is a deficient number, since it is larger than the sum of its proper divisors (1).

172573601 is an equidigital number, since it uses as much as digits as its factorization.

172573601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 172573601 is about 13136.7271799334. The cubic root of 172573601 is about 556.7473011587.

The spelling of 172573601 in words is "one hundred seventy-two million, five hundred seventy-three thousand, six hundred one".