129823211 has 8 divisors (see below), whose sum is σ = 148473600. Its totient is φ = 111198888.

The previous prime is 129823193. The next prime is 129823217. The reversal of 129823211 is 112328921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129823211 is a prime.

It is a super-2 number, since 2×129823211² = 33708132228701042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129823217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5690 + ... + 17088.

It is an arithmetic number, because the mean of its divisors is an integer number (18559200).

Almost surely, 2^129823211 is an apocalyptic number.

129823211 is a deficient number, since it is larger than the sum of its proper divisors (18650389).

129823211 is a wasteful number, since it uses less digits than its factorization.

129823211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13033.

The product of its digits is 1728, while the sum is 29.

The square root of 129823211 is about 11393.9989029313. The cubic root of 129823211 is about 506.3499625598.

The spelling of 129823211 in words is "one hundred twenty-nine million, eight hundred twenty-three thousand, two hundred eleven".