129163429 has 4 divisors (see below), whose sum is σ = 129986284. Its totient is φ = 128340576.

The previous prime is 129163409. The next prime is 129163457. The reversal of 129163429 is 924361921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81180100 + 47983329 = 9010^2 + 6927^2 .

It is a cyclic number.

It is not a de Polignac number, because 129163429 - 2¹³ = 129155237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129163409) 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, 411192 + ... + 411505.

It is an arithmetic number, because the mean of its divisors is an integer number (32496571).

Almost surely, 2^129163429 is an apocalyptic number.

It is an amenable number.

129163429 is a deficient number, since it is larger than the sum of its proper divisors (822855).

129163429 is an equidigital number, since it uses as much as digits as its factorization.

129163429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822854.

The product of its digits is 23328, while the sum is 37.

The square root of 129163429 is about 11365.0089749195. The cubic root of 129163429 is about 505.4907219001.

The spelling of 129163429 in words is "one hundred twenty-nine million, one hundred sixty-three thousand, four hundred twenty-nine".