129047655 has 16 divisors (see below), whose sum is σ = 225247104. Its totient is φ = 62568480.

The previous prime is 129047617. The next prime is 129047657. The reversal of 129047655 is 556740921.

It is not a de Polignac number, because 129047655 - 2⁶ = 129047591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129047657) 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, 390889 + ... + 391218.

It is an arithmetic number, because the mean of its divisors is an integer number (14077944).

Almost surely, 2^129047655 is an apocalyptic number.

129047655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129047655 is a deficient number, since it is larger than the sum of its proper divisors (96199449).

129047655 is a wasteful number, since it uses less digits than its factorization.

129047655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782126.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 129047655 is about 11359.9143922831. The cubic root of 129047655 is about 505.3396466890.

The spelling of 129047655 in words is "one hundred twenty-nine million, forty-seven thousand, six hundred fifty-five".