129903 has 16 divisors (see below), whose sum is σ = 190080. Its totient is φ = 78624.

The previous prime is 129901. The next prime is 129917. The reversal of 129903 is 309921.

It is a happy number.

It is not a de Polignac number, because 129903 - 2¹ = 129901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2425 + ... + 2477.

It is an arithmetic number, because the mean of its divisors is an integer number (11880).

2¹²⁹⁹⁰³ is an apocalyptic number.

129903 is a deficient number, since it is larger than the sum of its proper divisors (60177).

129903 is a wasteful number, since it uses less digits than its factorization.

129903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 129903 is about 360.4205876473. The cubic root of 129903 is about 50.6453675095.

The spelling of 129903 in words is "one hundred twenty-nine thousand, nine hundred three".