129579055 has 4 divisors (see below), whose sum is σ = 155494872. Its totient is φ = 103663240.

The previous prime is 129579041. The next prime is 129579077. The reversal of 129579055 is 550975921.

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: 550975921 = 2531 ⋅217691.

It is not a de Polignac number, because 129579055 - 2¹³ = 129570863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12957901 + ... + 12957910.

It is an arithmetic number, because the mean of its divisors is an integer number (38873718).

Almost surely, 2^129579055 is an apocalyptic number.

129579055 is a deficient number, since it is larger than the sum of its proper divisors (25915817).

129579055 is an equidigital number, since it uses as much as digits as its factorization.

129579055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25915816.

The product of its (nonzero) digits is 141750, while the sum is 43.

The square root of 129579055 is about 11383.2796240802. The cubic root of 129579055 is about 506.0323358339.

The spelling of 129579055 in words is "one hundred twenty-nine million, five hundred seventy-nine thousand, fifty-five".