129487967 has 8 divisors (see below), whose sum is σ = 149344800. Its totient is φ = 109970784.

The previous prime is 129487951. The next prime is 129487973. The reversal of 129487967 is 769784921.

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

It is not a de Polignac number, because 129487967 - 2⁴ = 129487951 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 (129487667) 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, 84092 + ... + 85617.

It is an arithmetic number, because the mean of its divisors is an integer number (18668100).

Almost surely, 2^129487967 is an apocalyptic number.

129487967 is a deficient number, since it is larger than the sum of its proper divisors (19856833).

129487967 is a wasteful number, since it uses less digits than its factorization.

129487967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169825.

The product of its digits is 1524096, while the sum is 53.

The square root of 129487967 is about 11379.2779647920. The cubic root of 129487967 is about 505.9137357044.

The spelling of 129487967 in words is "one hundred twenty-nine million, four hundred eighty-seven thousand, nine hundred sixty-seven".