129435403 has 2 divisors, whose sum is σ = 129435404. Its totient is φ = 129435402.

The previous prime is 129435379. The next prime is 129435407. The reversal of 129435403 is 304534921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129435403 - 2²⁵ = 95880971 is a prime.

It is not a weakly prime, because it can be changed into another prime (129435407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64717701 + 64717702.

It is an arithmetic number, because the mean of its divisors is an integer number (64717702).

Almost surely, 2^129435403 is an apocalyptic number.

129435403 is a deficient number, since it is larger than the sum of its proper divisors (1).

129435403 is an equidigital number, since it uses as much as digits as its factorization.

129435403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 129435403 is about 11376.9680934773. The cubic root of 129435403 is about 505.8452700150.

The spelling of 129435403 in words is "one hundred twenty-nine million, four hundred thirty-five thousand, four hundred three".