129096785 has 8 divisors (see below), whose sum is σ = 155276520. Its totient is φ = 103037184.

The previous prime is 129096767. The next prime is 129096791. The reversal of 129096785 is 587690921.

It can be written as a sum of positive squares in 4 ways, for example, as 1700416 + 127396369 = 1304^2 + 11287^2 .

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 129096785 - 2⁸ = 129096529 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27650 + ... + 31979.

It is an arithmetic number, because the mean of its divisors is an integer number (19409565).

Almost surely, 2^129096785 is an apocalyptic number.

It is an amenable number.

129096785 is a deficient number, since it is larger than the sum of its proper divisors (26179735).

129096785 is an equidigital number, since it uses as much as digits as its factorization.

129096785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60067.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 129096785 is about 11362.0766147743. The cubic root of 129096785 is about 505.4037681869.

The spelling of 129096785 in words is "one hundred twenty-nine million, ninety-six thousand, seven hundred eighty-five".