129659955 has 8 divisors (see below), whose sum is σ = 207455952. Its totient is φ = 69151968.

The previous prime is 129659923. The next prime is 129659977. The reversal of 129659955 is 559956921.

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

It is not a de Polignac number, because 129659955 - 2⁵ = 129659923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129659898 and 129659907.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4321984 + ... + 4322013.

It is an arithmetic number, because the mean of its divisors is an integer number (25931994).

Almost surely, 2^129659955 is an apocalyptic number.

129659955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129659955 is a deficient number, since it is larger than the sum of its proper divisors (77795997).

129659955 is an equidigital number, since it uses as much as digits as its factorization.

129659955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8644005.

The product of its digits is 1093500, while the sum is 51.

The square root of 129659955 is about 11386.8325270902. The cubic root of 129659955 is about 506.1376241959.

The spelling of 129659955 in words is "one hundred twenty-nine million, six hundred fifty-nine thousand, nine hundred fifty-five".