129809355 has 64 divisors (see below), whose sum is σ = 236500992. Its totient is φ = 60318720.

The previous prime is 129809353. The next prime is 129809411. The reversal of 129809355 is 553908921.

It is not a de Polignac number, because 129809355 - 2¹ = 129809353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129809353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 461815 + ... + 462095.

It is an arithmetic number, because the mean of its divisors is an integer number (3695328).

Almost surely, 2^129809355 is an apocalyptic number.

129809355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129809355 is a deficient number, since it is larger than the sum of its proper divisors (106691637).

129809355 is a wasteful number, since it uses less digits than its factorization.

129809355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 129809355 is about 11393.3908473290. The cubic root of 129809355 is about 506.3319477158.

The spelling of 129809355 in words is "one hundred twenty-nine million, eight hundred nine thousand, three hundred fifty-five".