129939207 has 8 divisors (see below), whose sum is σ = 173996784. Its totient is φ = 86253888.

The previous prime is 129939151. The next prime is 129939223. The reversal of 129939207 is 702939921.

It is a happy number.

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

It is not a de Polignac number, because 129939207 - 2¹² = 129935111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129939287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92248 + ... + 93645.

It is an arithmetic number, because the mean of its divisors is an integer number (21749598).

Almost surely, 2^129939207 is an apocalyptic number.

129939207 is a deficient number, since it is larger than the sum of its proper divisors (44057577).

129939207 is a wasteful number, since it uses less digits than its factorization.

129939207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186129.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 129939207 is about 11399.0879898350. The cubic root of 129939207 is about 506.5007242137.

The spelling of 129939207 in words is "one hundred twenty-nine million, nine hundred thirty-nine thousand, two hundred seven".