129808403 has 4 divisors (see below), whose sum is σ = 129939600. Its totient is φ = 129677208.

The previous prime is 129808397. The next prime is 129808409. The reversal of 129808403 is 304808921.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (129808397) and next prime (129808409).

It is a cyclic number.

It is not a de Polignac number, because 129808403 - 2⁶ = 129808339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129808409) 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, 64103 + ... + 66096.

It is an arithmetic number, because the mean of its divisors is an integer number (32484900).

Almost surely, 2^129808403 is an apocalyptic number.

129808403 is a deficient number, since it is larger than the sum of its proper divisors (131197).

129808403 is an equidigital number, since it uses as much as digits as its factorization.

129808403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131196.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 129808403 is about 11393.3490686453. The cubic root of 129808403 is about 506.3307099283.

The spelling of 129808403 in words is "one hundred twenty-nine million, eight hundred eight thousand, four hundred three".