129136367 has 4 divisors (see below), whose sum is σ = 129210816. Its totient is φ = 129061920.

The previous prime is 129136361. The next prime is 129136379. The reversal of 129136367 is 763631921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 763631921 = 13 ⋅58740917.

It is a cyclic number.

It is not a de Polignac number, because 129136367 - 2⁴ = 129136351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129136367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129136361) 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 3 ways as a sum of consecutive naturals, for example, 34559 + ... + 38112.

It is an arithmetic number, because the mean of its divisors is an integer number (32302704).

Almost surely, 2^129136367 is an apocalyptic number.

129136367 is a deficient number, since it is larger than the sum of its proper divisors (74449).

129136367 is an equidigital number, since it uses as much as digits as its factorization.

129136367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74448.

The product of its digits is 40824, while the sum is 38.

The square root of 129136367 is about 11363.8183283613. The cubic root of 129136367 is about 505.4554163819.

The spelling of 129136367 in words is "one hundred twenty-nine million, one hundred thirty-six thousand, three hundred sixty-seven".