173669 has 2 divisors, whose sum is σ = 173670. Its totient is φ = 173668.

The previous prime is 173659. The next prime is 173671. The reversal of 173669 is 966371.

173669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172225 + 1444 = 415^2 + 38^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173669 is a prime.

It is a super-2 number, since 2×173669² = 60321843122, which contains 22 as substring.

Together with 173671, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86834 + 86835.

It is an arithmetic number, because the mean of its divisors is an integer number (86835).

2¹⁷³⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

173669 is a deficient number, since it is larger than the sum of its proper divisors (1).

173669 is an equidigital number, since it uses as much as digits as its factorization.

173669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 32.

The square root of 173669 is about 416.7361275436. The cubic root of 173669 is about 55.7922789212.

The spelling of 173669 in words is "one hundred seventy-three thousand, six hundred sixty-nine".