129006839 has 16 divisors (see below), whose sum is σ = 145915392. Its totient is φ = 113164128.

The previous prime is 129006833. The next prime is 129006847. The reversal of 129006839 is 938600921.

It is a cyclic number.

It is not a de Polignac number, because 129006839 - 2¹⁶ = 128941303 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129006833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47414 + ... + 50060.

It is an arithmetic number, because the mean of its divisors is an integer number (9119712).

Almost surely, 2^129006839 is an apocalyptic number.

129006839 is a deficient number, since it is larger than the sum of its proper divisors (16908553).

129006839 is a wasteful number, since it uses less digits than its factorization.

129006839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 129006839 is about 11358.1177577977. The cubic root of 129006839 is about 505.2863637423.

The spelling of 129006839 in words is "one hundred twenty-nine million, six thousand, eight hundred thirty-nine".