2171246929 has 2 divisors, whose sum is σ = 2171246930. Its totient is φ = 2171246928.

The previous prime is 2171246911. The next prime is 2171246939. The reversal of 2171246929 is 9296421712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1831840000 + 339406929 = 42800^2 + 18423^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171246929 - 2¹⁵ = 2171214161 is a prime.

It is not a weakly prime, because it can be changed into another prime (2171246939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085623464 + 1085623465.

It is an arithmetic number, because the mean of its divisors is an integer number (1085623465).

Almost surely, 2^2171246929 is an apocalyptic number.

It is an amenable number.

2171246929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171246929 is an equidigital number, since it uses as much as digits as its factorization.

2171246929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 2171246929 is about 46596.6407480196. The cubic root of 2171246929 is about 1294.9005213707.

The spelling of 2171246929 in words is "two billion, one hundred seventy-one million, two hundred forty-six thousand, nine hundred twenty-nine".