129123319 has 8 divisors (see below), whose sum is σ = 139144320. Its totient is φ = 119114976.

The previous prime is 129123301. The next prime is 129123359. The reversal of 129123319 is 913321921.

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

It is a cyclic number.

It is not a de Polignac number, because 129123319 - 2⁵ = 129123287 is a prime.

It is a super-2 number, since 2×129123319² = 33345663019151522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129123359) 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 7 ways as a sum of consecutive naturals, for example, 36762 + ... + 40120.

It is an arithmetic number, because the mean of its divisors is an integer number (17393040).

Almost surely, 2^129123319 is an apocalyptic number.

129123319 is a deficient number, since it is larger than the sum of its proper divisors (10021001).

129123319 is a wasteful number, since it uses less digits than its factorization.

129123319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6329.

The product of its digits is 2916, while the sum is 31.

The square root of 129123319 is about 11363.2442110517. The cubic root of 129123319 is about 505.4383919898.

The spelling of 129123319 in words is "one hundred twenty-nine million, one hundred twenty-three thousand, three hundred nineteen".