1172408866129 has 4 divisors (see below), whose sum is σ = 1172807783280. Its totient is φ = 1172009948980.

The previous prime is 1172408866117. The next prime is 1172408866141. The reversal of 1172408866129 is 9216688042711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1172408866117) and next prime (1172408866141).

It is a cyclic number.

It is not a de Polignac number, because 1172408866129 - 2⁷ = 1172408866001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1172408866129.

It is not an unprimeable number, because it can be changed into a prime (1172408866169) 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, 199454167 + ... + 199460044.

It is an arithmetic number, because the mean of its divisors is an integer number (293201945820).

Almost surely, 2^{1172408866129} is an apocalyptic number.

It is an amenable number.

1172408866129 is a deficient number, since it is larger than the sum of its proper divisors (398917151).

1172408866129 is an equidigital number, since it uses as much as digits as its factorization.

1172408866129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398917150.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 1172408866129 in words is "one trillion, one hundred seventy-two billion, four hundred eight million, eight hundred sixty-six thousand, one hundred twenty-nine".