129365329 has 4 divisors (see below), whose sum is σ = 129466980. Its totient is φ = 129263680.

The previous prime is 129365321. The next prime is 129365333. The reversal of 129365329 is 923563921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 923563921 = 7 ⋅131937703.

It can be written as a sum of positive squares in 2 ways, for example, as 58553104 + 70812225 = 7652^2 + 8415^2 .

It is a cyclic number.

It is not a de Polignac number, because 129365329 - 2³ = 129365321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129365291 and 129365300.

It is not an unprimeable number, because it can be changed into a prime (129365321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48892 + ... + 51469.

It is an arithmetic number, because the mean of its divisors is an integer number (32366745).

Almost surely, 2^129365329 is an apocalyptic number.

It is an amenable number.

129365329 is a deficient number, since it is larger than the sum of its proper divisors (101651).

129365329 is a wasteful number, since it uses less digits than its factorization.

129365329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101650.

The product of its digits is 87480, while the sum is 40.

The square root of 129365329 is about 11373.8880335618. Note that the first 3 decimals coincide. The cubic root of 129365329 is about 505.7539683586.

The spelling of 129365329 in words is "one hundred twenty-nine million, three hundred sixty-five thousand, three hundred twenty-nine".