129327987 has 16 divisors (see below), whose sum is σ = 177462432. Its totient is φ = 83715840.

The previous prime is 129327971. The next prime is 129328013. The reversal of 129327987 is 789723921.

It is not a de Polignac number, because 129327987 - 2⁴ = 129327971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129327917) 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 15 ways as a sum of consecutive naturals, for example, 74287 + ... + 76007.

It is an arithmetic number, because the mean of its divisors is an integer number (11091402).

Almost surely, 2^129327987 is an apocalyptic number.

129327987 is a deficient number, since it is larger than the sum of its proper divisors (48134445).

129327987 is a wasteful number, since it uses less digits than its factorization.

129327987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438.

The product of its digits is 381024, while the sum is 48.

The square root of 129327987 is about 11372.2463480176. The cubic root of 129327987 is about 505.7053008052.

The spelling of 129327987 in words is "one hundred twenty-nine million, three hundred twenty-seven thousand, nine hundred eighty-seven".