129318147 has 32 divisors (see below), whose sum is σ = 222681600. Its totient is φ = 72637344.

The previous prime is 129318139. The next prime is 129318191. The reversal of 129318147 is 741813921.

It is a happy number.

It is not a de Polignac number, because 129318147 - 2³ = 129318139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129318127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5353 + ... + 16949.

It is an arithmetic number, because the mean of its divisors is an integer number (6958800).

Almost surely, 2^129318147 is an apocalyptic number.

129318147 is a deficient number, since it is larger than the sum of its proper divisors (93363453).

129318147 is a wasteful number, since it uses less digits than its factorization.

129318147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11672 (or 11666 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 129318147 is about 11371.8137075842. The cubic root of 129318147 is about 505.6924748463.

The spelling of 129318147 in words is "one hundred twenty-nine million, three hundred eighteen thousand, one hundred forty-seven".