129906422 has 8 divisors (see below), whose sum is σ = 194918400. Its totient is φ = 64933624.

The previous prime is 129906421. The next prime is 129906431. The reversal of 129906422 is 224609921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129906421) 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 3 ways as a sum of consecutive naturals, for example, 779 + ... + 16137.

It is an arithmetic number, because the mean of its divisors is an integer number (24364800).

Almost surely, 2^129906422 is an apocalyptic number.

129906422 is a deficient number, since it is larger than the sum of its proper divisors (65011978).

129906422 is a wasteful number, since it uses less digits than its factorization.

129906422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19590.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 129906422 is about 11397.6498454725. The cubic root of 129906422 is about 506.4581221810.

The spelling of 129906422 in words is "one hundred twenty-nine million, nine hundred six thousand, four hundred twenty-two".