129746429 has 2 divisors, whose sum is σ = 129746430. Its totient is φ = 129746428.

The previous prime is 129746389. The next prime is 129746467. The reversal of 129746429 is 924647921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125328025 + 4418404 = 11195^2 + 2102^2 .

It is an emirp because it is prime and its reverse (924647921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129746429 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129746429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129746479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64873214 + 64873215.

It is an arithmetic number, because the mean of its divisors is an integer number (64873215).

Almost surely, 2^129746429 is an apocalyptic number.

It is an amenable number.

129746429 is a deficient number, since it is larger than the sum of its proper divisors (1).

129746429 is an equidigital number, since it uses as much as digits as its factorization.

129746429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 129746429 is about 11390.6289993134. The cubic root of 129746429 is about 506.2501184982.

The spelling of 129746429 in words is "one hundred twenty-nine million, seven hundred forty-six thousand, four hundred twenty-nine".