129429473 has 2 divisors, whose sum is σ = 129429474. Its totient is φ = 129429472.

The previous prime is 129429439. The next prime is 129429529. The reversal of 129429473 is 374924921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65157184 + 64272289 = 8072^2 + 8017^2 .

It is a cyclic number.

It is not a de Polignac number, because 129429473 - 2⁸ = 129429217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129429473.

It is not a weakly prime, because it can be changed into another prime (129429173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64714736 + 64714737.

It is an arithmetic number, because the mean of its divisors is an integer number (64714737).

Almost surely, 2^129429473 is an apocalyptic number.

It is an amenable number.

129429473 is a deficient number, since it is larger than the sum of its proper divisors (1).

129429473 is an equidigital number, since it uses as much as digits as its factorization.

129429473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 129429473 is about 11376.7074762429. The cubic root of 129429473 is about 505.8375449048.

The spelling of 129429473 in words is "one hundred twenty-nine million, four hundred twenty-nine thousand, four hundred seventy-three".