129655005 has 16 divisors (see below), whose sum is σ = 219651264. Its totient is φ = 65081600.

The previous prime is 129654901. The next prime is 129655007. The reversal of 129655005 is 500556921.

It is not a de Polignac number, because 129655005 - 2¹⁰ = 129653981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129655007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253971 + ... + 254480.

It is an arithmetic number, because the mean of its divisors is an integer number (13728204).

Almost surely, 2^129655005 is an apocalyptic number.

129655005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129655005 is a deficient number, since it is larger than the sum of its proper divisors (89996259).

129655005 is a wasteful number, since it uses less digits than its factorization.

129655005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508476.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 129655005 is about 11386.6151686970. The cubic root of 129655005 is about 506.1311832118.

The spelling of 129655005 in words is "one hundred twenty-nine million, six hundred fifty-five thousand, five".