172279 has 2 divisors, whose sum is σ = 172280. Its totient is φ = 172278.

The previous prime is 172259. The next prime is 172283. The reversal of 172279 is 972271.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (972271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172279 - 2¹¹ = 170231 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86139 + 86140.

It is an arithmetic number, because the mean of its divisors is an integer number (86140).

2¹⁷²²⁷⁹ is an apocalyptic number.

172279 is a deficient number, since it is larger than the sum of its proper divisors (1).

172279 is an equidigital number, since it uses as much as digits as its factorization.

172279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 28.

The square root of 172279 is about 415.0650551420. The cubic root of 172279 is about 55.6430312289.

The spelling of 172279 in words is "one hundred seventy-two thousand, two hundred seventy-nine".