172369 has 4 divisors (see below), whose sum is σ = 174244. Its totient is φ = 170496.

The previous prime is 172357. The next prime is 172373. The reversal of 172369 is 963271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 963271 = 17 ⋅56663.

It can be written as a sum of positive squares in 2 ways, for example, as 82369 + 90000 = 287^2 + 300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172369 is a prime.

It is a super-2 number, since 2×172369² = 59422144322, which contains 22 as substring.

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792 + ... + 985.

It is an arithmetic number, because the mean of its divisors is an integer number (43561).

2¹⁷²³⁶⁹ is an apocalyptic number.

It is an amenable number.

172369 is a deficient number, since it is larger than the sum of its proper divisors (1875).

172369 is an equidigital number, since it uses as much as digits as its factorization.

172369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874.

The product of its digits is 2268, while the sum is 28.

The square root of 172369 is about 415.1734577258. The cubic root of 172369 is about 55.6527190047.

The spelling of 172369 in words is "one hundred seventy-two thousand, three hundred sixty-nine".