129174091309 has 4 divisors (see below), whose sum is σ = 132665283004. Its totient is φ = 125682899616.

The previous prime is 129174091307. The next prime is 129174091349. The reversal of 129174091309 is 903190471921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120083040900 + 9091050409 = 346530^2 + 95347^2 .

It is a cyclic number.

It is not a de Polignac number, because 129174091309 - 2¹ = 129174091307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129174091307) 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 3 ways as a sum of consecutive naturals, for example, 1745595792 + ... + 1745595865.

It is an arithmetic number, because the mean of its divisors is an integer number (33166320751).

Almost surely, 2^129174091309 is an apocalyptic number.

It is an amenable number.

129174091309 is a deficient number, since it is larger than the sum of its proper divisors (3491191695).

129174091309 is an equidigital number, since it uses as much as digits as its factorization.

129174091309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491191694.

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 129174091309 in words is "one hundred twenty-nine billion, one hundred seventy-four million, ninety-one thousand, three hundred nine".