129323765 has 8 divisors (see below), whose sum is σ = 155253408. Its totient is φ = 103415760.

The previous prime is 129323759. The next prime is 129323783. The reversal of 129323765 is 567323921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129323765 - 2⁴ = 129323749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14234 + ... + 21476.

It is an arithmetic number, because the mean of its divisors is an integer number (19406676).

Almost surely, 2^129323765 is an apocalyptic number.

It is an amenable number.

129323765 is a deficient number, since it is larger than the sum of its proper divisors (25929643).

129323765 is an equidigital number, since it uses as much as digits as its factorization.

129323765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10819.

The product of its digits is 68040, while the sum is 38.

The square root of 129323765 is about 11372.0607191485. The cubic root of 129323765 is about 505.6997977143.

The spelling of 129323765 in words is "one hundred twenty-nine million, three hundred twenty-three thousand, seven hundred sixty-five".