172171361 has 2 divisors, whose sum is σ = 172171362. Its totient is φ = 172171360.

The previous prime is 172171327. The next prime is 172171403. The reversal of 172171361 is 163171271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171741025 + 430336 = 13105^2 + 656^2 .

It is a cyclic number.

It is not a de Polignac number, because 172171361 - 2⁶ = 172171297 is a prime.

It is not a weakly prime, because it can be changed into another prime (172171061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86085680 + 86085681.

It is an arithmetic number, because the mean of its divisors is an integer number (86085681).

Almost surely, 2^172171361 is an apocalyptic number.

It is an amenable number.

172171361 is a deficient number, since it is larger than the sum of its proper divisors (1).

172171361 is an equidigital number, since it uses as much as digits as its factorization.

172171361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 29.

The square root of 172171361 is about 13121.4084990903. The cubic root of 172171361 is about 556.3144032488.

The spelling of 172171361 in words is "one hundred seventy-two million, one hundred seventy-one thousand, three hundred sixty-one".