129193705 has 8 divisors (see below), whose sum is σ = 155961792. Its totient is φ = 102735408.

The previous prime is 129193703. The next prime is 129193723. The reversal of 129193705 is 507391921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129193705 - 2¹ = 129193703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129193703) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 76527 + ... + 78196.

It is an arithmetic number, because the mean of its divisors is an integer number (19495224).

Almost surely, 2^129193705 is an apocalyptic number.

It is an amenable number.

129193705 is a deficient number, since it is larger than the sum of its proper divisors (26768087).

129193705 is a wasteful number, since it uses less digits than its factorization.

129193705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154895.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 129193705 is about 11366.3408799842. The cubic root of 129193705 is about 505.5302146100.

The spelling of 129193705 in words is "one hundred twenty-nine million, one hundred ninety-three thousand, seven hundred five".