172206193 has 2 divisors, whose sum is σ = 172206194. Its totient is φ = 172206192.

The previous prime is 172206187. The next prime is 172206211. The reversal of 172206193 is 391602271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165688384 + 6517809 = 12872^2 + 2553^2 .

It is an emirp because it is prime and its reverse (391602271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172206193 - 2⁹ = 172205681 is a prime.

It is not a weakly prime, because it can be changed into another prime (172206113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86103096 + 86103097.

It is an arithmetic number, because the mean of its divisors is an integer number (86103097).

Almost surely, 2^172206193 is an apocalyptic number.

It is an amenable number.

172206193 is a deficient number, since it is larger than the sum of its proper divisors (1).

172206193 is an equidigital number, since it uses as much as digits as its factorization.

172206193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 172206193 is about 13122.7357284981. The cubic root of 172206193 is about 556.3519167209.

The spelling of 172206193 in words is "one hundred seventy-two million, two hundred six thousand, one hundred ninety-three".