172171327 has 2 divisors, whose sum is σ = 172171328. Its totient is φ = 172171326.

The previous prime is 172171313. The next prime is 172171361. The reversal of 172171327 is 723171271.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (723171271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172171327 - 2¹⁹ = 171647039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172141327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86085663 + 86085664.

It is an arithmetic number, because the mean of its divisors is an integer number (86085664).

Almost surely, 2^172171327 is an apocalyptic number.

172171327 is a deficient number, since it is larger than the sum of its proper divisors (1).

172171327 is an equidigital number, since it uses as much as digits as its factorization.

172171327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4116, while the sum is 31.

The square root of 172171327 is about 13121.4072034976. The cubic root of 172171327 is about 556.3143666289.

The spelling of 172171327 in words is "one hundred seventy-two million, one hundred seventy-one thousand, three hundred twenty-seven".