129117377 has 4 divisors (see below), whose sum is σ = 134731200. Its totient is φ = 123503556.

The previous prime is 129117371. The next prime is 129117421. The reversal of 129117377 is 773711921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129117377 - 2¹⁰ = 129116353 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 129117377.

It is not an unprimeable number, because it can be changed into a prime (129117371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2806877 + ... + 2806922.

It is an arithmetic number, because the mean of its divisors is an integer number (33682800).

Almost surely, 2^129117377 is an apocalyptic number.

It is an amenable number.

129117377 is a deficient number, since it is larger than the sum of its proper divisors (5613823).

129117377 is an equidigital number, since it uses as much as digits as its factorization.

129117377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5613822.

The product of its digits is 18522, while the sum is 38.

The square root of 129117377 is about 11362.9827510210. The cubic root of 129117377 is about 505.4306387789.

The spelling of 129117377 in words is "one hundred twenty-nine million, one hundred seventeen thousand, three hundred seventy-seven".