129439211 has 4 divisors (see below), whose sum is σ = 141206424. Its totient is φ = 117672000.

The previous prime is 129439187. The next prime is 129439217. The reversal of 129439211 is 112934921.

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 129439211 - 2¹⁴ = 129422827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129439217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5883590 + ... + 5883611.

It is an arithmetic number, because the mean of its divisors is an integer number (35301606).

Almost surely, 2^129439211 is an apocalyptic number.

129439211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129439211 is a deficient number, since it is larger than the sum of its proper divisors (11767213).

129439211 is a wasteful number, since it uses less digits than its factorization.

129439211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11767212.

The product of its digits is 3888, while the sum is 32.

The square root of 129439211 is about 11377.1354479060. The cubic root of 129439211 is about 505.8502306359.

The spelling of 129439211 in words is "one hundred twenty-nine million, four hundred thirty-nine thousand, two hundred eleven".