129329 has 4 divisors (see below), whose sum is σ = 134976. Its totient is φ = 123684.

The previous prime is 129313. The next prime is 129341. The reversal of 129329 is 923921.

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: 923921 = 373 ⋅2477.

It is a cyclic number.

It is not a de Polignac number, because 129329 - 2⁴ = 129313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129298 and 129307.

It is not an unprimeable number, because it can be changed into a prime (129379) 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, 2789 + ... + 2834.

It is an arithmetic number, because the mean of its divisors is an integer number (33744).

2¹²⁹³²⁹ is an apocalyptic number.

It is an amenable number.

129329 is a deficient number, since it is larger than the sum of its proper divisors (5647).

129329 is an equidigital number, since it uses as much as digits as its factorization.

129329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646.

The product of its digits is 972, while the sum is 26.

The square root of 129329 is about 359.6234141432. The cubic root of 129329 is about 50.5706621164.

The spelling of 129329 in words is "one hundred twenty-nine thousand, three hundred twenty-nine".