129538767 has 8 divisors (see below), whose sum is σ = 173717424. Its totient is φ = 85859648.

The previous prime is 129538763. The next prime is 129538769. The reversal of 129538767 is 767835921.

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 129538767 - 2² = 129538763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129538763) 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 7 ways as a sum of consecutive naturals, for example, 124278 + ... + 125315.

It is an arithmetic number, because the mean of its divisors is an integer number (21714678).

Almost surely, 2^129538767 is an apocalyptic number.

129538767 is a deficient number, since it is larger than the sum of its proper divisors (44178657).

129538767 is a wasteful number, since it uses less digits than its factorization.

129538767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249769.

The product of its digits is 635040, while the sum is 48.

The square root of 129538767 is about 11381.5098734746. The cubic root of 129538767 is about 505.9798861435.

It can be divided in two parts, 129538 and 767, that added together give a triangular number (130305 = T₅₁₀).

The spelling of 129538767 in words is "one hundred twenty-nine million, five hundred thirty-eight thousand, seven hundred sixty-seven".