2129243717 has 2 divisors, whose sum is σ = 2129243718. Its totient is φ = 2129243716.

The previous prime is 2129243663. The next prime is 2129243723. The reversal of 2129243717 is 7173429212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2127607876 + 1635841 = 46126^2 + 1279^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129243717 - 2¹² = 2129239621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129243747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064621858 + 1064621859.

It is an arithmetic number, because the mean of its divisors is an integer number (1064621859).

Almost surely, 2^2129243717 is an apocalyptic number.

It is an amenable number.

2129243717 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129243717 is an equidigital number, since it uses as much as digits as its factorization.

2129243717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 2129243717 is about 46143.7289022030. The cubic root of 2129243717 is about 1286.4960530290.

The spelling of 2129243717 in words is "two billion, one hundred twenty-nine million, two hundred forty-three thousand, seven hundred seventeen".