172397 has 4 divisors (see below), whose sum is σ = 182556. Its totient is φ = 162240.

The previous prime is 172373. The next prime is 172399. The reversal of 172397 is 793271.

It is a happy number.

172397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 793271 = 17 ⋅46663.

It can be written as a sum of positive squares in 2 ways, for example, as 81796 + 90601 = 286^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 172397 - 2¹⁶ = 106861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5054 + ... + 5087.

It is an arithmetic number, because the mean of its divisors is an integer number (45639).

2¹⁷²³⁹⁷ is an apocalyptic number.

172397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

172397 is a deficient number, since it is larger than the sum of its proper divisors (10159).

172397 is a wasteful number, since it uses less digits than its factorization.

172397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10158.

The product of its digits is 2646, while the sum is 29.

The square root of 172397 is about 415.2071772019. The cubic root of 172397 is about 55.6557322917.

The spelling of 172397 in words is "one hundred seventy-two thousand, three hundred ninety-seven".