129003229 has 4 divisors (see below), whose sum is σ = 129223584. Its totient is φ = 128782876.

The previous prime is 129003221. The next prime is 129003233. The reversal of 129003229 is 922300921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 922300921 = 59 ⋅15632219.

It is a cyclic number.

It is not a de Polignac number, because 129003229 - 2³ = 129003221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129003197 and 129003206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129003221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109297 + ... + 110470.

It is an arithmetic number, because the mean of its divisors is an integer number (32305896).

Almost surely, 2^129003229 is an apocalyptic number.

It is an amenable number.

129003229 is a deficient number, since it is larger than the sum of its proper divisors (220355).

129003229 is an equidigital number, since it uses as much as digits as its factorization.

129003229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220354.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 129003229 is about 11357.9588395099. The cubic root of 129003229 is about 505.2816505535.

It can be divided in two parts, 12900 and 3229, that added together give a square (16129 = 127²).

The spelling of 129003229 in words is "one hundred twenty-nine million, three thousand, two hundred twenty-nine".