129003449 has 4 divisors (see below), whose sum is σ = 129115536. Its totient is φ = 128891364.

The previous prime is 129003443. The next prime is 129003461. The reversal of 129003449 is 944300921.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129003449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129003443) 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, 54299 + ... + 56624.

It is an arithmetic number, because the mean of its divisors is an integer number (32278884).

Almost surely, 2^129003449 is an apocalyptic number.

It is an amenable number.

129003449 is a deficient number, since it is larger than the sum of its proper divisors (112087).

129003449 is a wasteful number, since it uses less digits than its factorization.

129003449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112086.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 129003449 is about 11357.9685243445. The cubic root of 129003449 is about 505.2819377863.

The spelling of 129003449 in words is "one hundred twenty-nine million, three thousand, four hundred forty-nine".