129468029 has 4 divisors (see below), whose sum is σ = 131910876. Its totient is φ = 127025184.

The previous prime is 129468019. The next prime is 129468041. The reversal of 129468029 is 920864921.

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 73188025 + 56280004 = 8555^2 + 7502^2 .

It is a cyclic number.

It is not a de Polignac number, because 129468029 - 2¹² = 129463933 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 (129468019) 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, 1221344 + ... + 1221449.

It is an arithmetic number, because the mean of its divisors is an integer number (32977719).

Almost surely, 2^129468029 is an apocalyptic number.

It is an amenable number.

129468029 is a deficient number, since it is larger than the sum of its proper divisors (2442847).

129468029 is an equidigital number, since it uses as much as digits as its factorization.

129468029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442846.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 129468029 is about 11378.4018649369. The cubic root of 129468029 is about 505.8877682315.

The spelling of 129468029 in words is "one hundred twenty-nine million, four hundred sixty-eight thousand, twenty-nine".