129253429 has 2 divisors, whose sum is σ = 129253430. Its totient is φ = 129253428.

The previous prime is 129253417. The next prime is 129253457. The reversal of 129253429 is 924352921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112402404 + 16851025 = 10602^2 + 4105^2 .

It is an emirp because it is prime and its reverse (924352921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129253429 - 2⁷ = 129253301 is a prime.

It is equal to p_7338268 and since 129253429 and 7338268 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129253529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64626714 + 64626715.

It is an arithmetic number, because the mean of its divisors is an integer number (64626715).

Almost surely, 2^129253429 is an apocalyptic number.

It is an amenable number.

129253429 is a deficient number, since it is larger than the sum of its proper divisors (1).

129253429 is an equidigital number, since it uses as much as digits as its factorization.

129253429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 129253429 is about 11368.9678071494. The cubic root of 129253429 is about 505.6081018808.

The spelling of 129253429 in words is "one hundred twenty-nine million, two hundred fifty-three thousand, four hundred twenty-nine".