129180949 has 8 divisors (see below), whose sum is σ = 138441600. Its totient is φ = 120224016.

The previous prime is 129180941. The next prime is 129180973. The reversal of 129180949 is 949081921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 129180949 - 2³ = 129180941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129180941) 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, 75049 + ... + 76750.

It is an arithmetic number, because the mean of its divisors is an integer number (17305200).

Almost surely, 2^129180949 is an apocalyptic number.

It is an amenable number.

129180949 is a deficient number, since it is larger than the sum of its proper divisors (9260651).

129180949 is a wasteful number, since it uses less digits than its factorization.

129180949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151859.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 129180949 is about 11365.7797356803. The cubic root of 129180949 is about 505.5135761428.

The spelling of 129180949 in words is "one hundred twenty-nine million, one hundred eighty thousand, nine hundred forty-nine".