129064905 has 12 divisors (see below), whose sum is σ = 223712580. Its totient is φ = 68834592.

The previous prime is 129064861. The next prime is 129064913. The reversal of 129064905 is 509460921.

129064905 is a `hidden beast` number, since 1 + 2 + 9 + 0 + 649 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37307664 + 91757241 = 6108^2 + 9579^2 .

It is not a de Polignac number, because 129064905 - 2⁶ = 129064841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129064905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1434010 + ... + 1434099.

It is an arithmetic number, because the mean of its divisors is an integer number (18642715).

Almost surely, 2^129064905 is an apocalyptic number.

129064905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129064905 is a deficient number, since it is larger than the sum of its proper divisors (94647675).

129064905 is a wasteful number, since it uses less digits than its factorization.

129064905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868120 (or 2868117 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 129064905 is about 11360.6736155916. The cubic root of 129064905 is about 505.3621621970.

The spelling of 129064905 in words is "one hundred twenty-nine million, sixty-four thousand, nine hundred five".