172180193 has 2 divisors, whose sum is σ = 172180194. Its totient is φ = 172180192.

The previous prime is 172180171. The next prime is 172180207. The reversal of 172180193 is 391081271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88585744 + 83594449 = 9412^2 + 9143^2 .

It is a cyclic number.

It is not a de Polignac number, because 172180193 - 2⁸ = 172179937 is a prime.

It is not a weakly prime, because it can be changed into another prime (172180103) 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, 86090096 + 86090097.

It is an arithmetic number, because the mean of its divisors is an integer number (86090097).

Almost surely, 2^172180193 is an apocalyptic number.

It is an amenable number.

172180193 is a deficient number, since it is larger than the sum of its proper divisors (1).

172180193 is an equidigital number, since it uses as much as digits as its factorization.

172180193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 172180193 is about 13121.7450440100. The cubic root of 172180193 is about 556.3239156415.

The spelling of 172180193 in words is "one hundred seventy-two million, one hundred eighty thousand, one hundred ninety-three".