129319 has 4 divisors (see below), whose sum is σ = 136944. Its totient is φ = 121696.

The previous prime is 129313. The next prime is 129341. The reversal of 129319 is 913921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129319 - 2⁵ = 129287 is a prime.

It is a super-2 number, since 2×129319² = 33446807522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129293 and 129302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3787 + ... + 3820.

It is an arithmetic number, because the mean of its divisors is an integer number (34236).

2¹²⁹³¹⁹ is an apocalyptic number.

129319 is a deficient number, since it is larger than the sum of its proper divisors (7625).

129319 is an equidigital number, since it uses as much as digits as its factorization.

129319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7624.

The product of its digits is 486, while the sum is 25.

The square root of 129319 is about 359.6095104415. The cubic root of 129319 is about 50.5693586716.

The spelling of 129319 in words is "one hundred twenty-nine thousand, three hundred nineteen".