129955449 has 8 divisors (see below), whose sum is σ = 186602752. Its totient is φ = 79972560.

The previous prime is 129955447. The next prime is 129955471. The reversal of 129955449 is 944559921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129955449 - 2¹ = 129955447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129955398 and 129955407.

It is not an unprimeable number, because it can be changed into a prime (129955447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1666057 + ... + 1666134.

It is an arithmetic number, because the mean of its divisors is an integer number (23325344).

Almost surely, 2^129955449 is an apocalyptic number.

It is an amenable number.

129955449 is a deficient number, since it is larger than the sum of its proper divisors (56647303).

129955449 is a wasteful number, since it uses less digits than its factorization.

129955449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332207.

The product of its digits is 583200, while the sum is 48.

The square root of 129955449 is about 11399.8003929893. The cubic root of 129955449 is about 506.5218270104.

The spelling of 129955449 in words is "one hundred twenty-nine million, nine hundred fifty-five thousand, four hundred forty-nine".