129903203 has 4 divisors (see below), whose sum is σ = 130055640. Its totient is φ = 129750768.

The previous prime is 129903199. The next prime is 129903229. The reversal of 129903203 is 302309921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129903203 - 2² = 129903199 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74933 + ... + 76646.

It is an arithmetic number, because the mean of its divisors is an integer number (32513910).

Almost surely, 2^129903203 is an apocalyptic number.

129903203 is a deficient number, since it is larger than the sum of its proper divisors (152437).

129903203 is an equidigital number, since it uses as much as digits as its factorization.

129903203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152436.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 129903203 is about 11397.5086312755. The cubic root of 129903203 is about 506.4539389078.

The spelling of 129903203 in words is "one hundred twenty-nine million, nine hundred three thousand, two hundred three".