129403 has 2 divisors, whose sum is σ = 129404. Its totient is φ = 129402.

The previous prime is 129401. The next prime is 129419. The reversal of 129403 is 304921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129403 - 2¹ = 129401 is a prime.

Together with 129401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (129401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64701 + 64702.

It is an arithmetic number, because the mean of its divisors is an integer number (64702).

2¹²⁹⁴⁰³ is an apocalyptic number.

129403 is a deficient number, since it is larger than the sum of its proper divisors (1).

129403 is an equidigital number, since it uses as much as digits as its factorization.

129403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 129403 is about 359.7262848333. The cubic root of 129403 is about 50.5803055207.

The spelling of 129403 in words is "one hundred twenty-nine thousand, four hundred three".