2129992709 has 16 divisors (see below), whose sum is σ = 2322167232. Its totient is φ = 1941988608.

The previous prime is 2129992703. The next prime is 2129992741. The reversal of 2129992709 is 9072999212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2129992709 - 2¹² = 2129988613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129992703) 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 15 ways as a sum of consecutive naturals, for example, 448622 + ... + 453344.

It is an arithmetic number, because the mean of its divisors is an integer number (145135452).

Almost surely, 2^2129992709 is an apocalyptic number.

It is an amenable number.

2129992709 is a deficient number, since it is larger than the sum of its proper divisors (192174523).

2129992709 is a wasteful number, since it uses less digits than its factorization.

2129992709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 2129992709 is about 46151.8440476651. The cubic root of 2129992709 is about 1286.6468831543.

The spelling of 2129992709 in words is "two billion, one hundred twenty-nine million, nine hundred ninety-two thousand, seven hundred nine".