129906554 has 32 divisors (see below), whose sum is σ = 216691200. Its totient is φ = 58129920.

The previous prime is 129906533. The next prime is 129906559. The reversal of 129906554 is 455609921.

129906554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129906559) 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 15 ways as a sum of consecutive naturals, for example, 61142 + ... + 63230.

It is an arithmetic number, because the mean of its divisors is an integer number (6771600).

Almost surely, 2^129906554 is an apocalyptic number.

129906554 is a deficient number, since it is larger than the sum of its proper divisors (86784646).

129906554 is a wasteful number, since it uses less digits than its factorization.

129906554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 129906554 is about 11397.6556361385. The cubic root of 129906554 is about 506.4582937210.

The spelling of 129906554 in words is "one hundred twenty-nine million, nine hundred six thousand, five hundred fifty-four".