129733905 has 32 divisors (see below), whose sum is σ = 238316544. Its totient is φ = 59034816.

The previous prime is 129733889. The next prime is 129733937. The reversal of 129733905 is 509337921.

It is not a de Polignac number, because 129733905 - 2⁴ = 129733889 is a prime.

It is a super-2 number, since 2×129733905² = 33661772213098050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21114 + ... + 26556.

It is an arithmetic number, because the mean of its divisors is an integer number (7447392).

Almost surely, 2^129733905 is an apocalyptic number.

129733905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129733905 is a deficient number, since it is larger than the sum of its proper divisors (108582639).

129733905 is a wasteful number, since it uses less digits than its factorization.

129733905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5685.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 129733905 is about 11390.0792358965. The cubic root of 129733905 is about 506.2338290826.

The spelling of 129733905 in words is "one hundred twenty-nine million, seven hundred thirty-three thousand, nine hundred five".