173129 has 4 divisors (see below), whose sum is σ = 188880. Its totient is φ = 157380.

The previous prime is 173099. The next prime is 173137. The reversal of 173129 is 921371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 921371 = 11 ⋅83761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (173149) 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, 7859 + ... + 7880.

It is an arithmetic number, because the mean of its divisors is an integer number (47220).

2¹⁷³¹²⁹ is an apocalyptic number.

It is an amenable number.

173129 is a deficient number, since it is larger than the sum of its proper divisors (15751).

173129 is a wasteful number, since it uses less digits than its factorization.

173129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15750.

The product of its digits is 378, while the sum is 23.

The square root of 173129 is about 416.0877311337. The cubic root of 173129 is about 55.7343927301.

The spelling of 173129 in words is "one hundred seventy-three thousand, one hundred twenty-nine".