129686927 has 8 divisors (see below), whose sum is σ = 134292000. Its totient is φ = 125090784.

The previous prime is 129686917. The next prime is 129686933. The reversal of 129686927 is 729686921.

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 129686927 - 2⁴ = 129686911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129686917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43478 + ... + 46364.

It is an arithmetic number, because the mean of its divisors is an integer number (16786500).

Almost surely, 2^129686927 is an apocalyptic number.

129686927 is a deficient number, since it is larger than the sum of its proper divisors (4605073).

129686927 is a wasteful number, since it uses less digits than its factorization.

129686927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4465.

The product of its digits is 653184, while the sum is 50.

The square root of 129686927 is about 11388.0168159342. The cubic root of 129686927 is about 506.1727175226.

The spelling of 129686927 in words is "one hundred twenty-nine million, six hundred eighty-six thousand, nine hundred twenty-seven".