129903213 has 16 divisors (see below), whose sum is σ = 190161216. Its totient is φ = 78224640.

The previous prime is 129903199. The next prime is 129903229. The reversal of 129903213 is 312309921.

It is a happy number.

It is not a de Polignac number, because 129903213 - 2⁵ = 129903181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129903283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7356 + ... + 17717.

It is an arithmetic number, because the mean of its divisors is an integer number (11885076).

Almost surely, 2^129903213 is an apocalyptic number.

It is an amenable number.

129903213 is a deficient number, since it is larger than the sum of its proper divisors (60258003).

129903213 is a wasteful number, since it uses less digits than its factorization.

129903213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25244.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 129903213 is about 11397.5090699679. The cubic root of 129903213 is about 506.4539519034.

The spelling of 129903213 in words is "one hundred twenty-nine million, nine hundred three thousand, two hundred thirteen".