2101686929 has 2 divisors, whose sum is σ = 2101686930. Its totient is φ = 2101686928.

The previous prime is 2101686911. The next prime is 2101686941. The reversal of 2101686929 is 9296861012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1396890625 + 704796304 = 37375^2 + 26548^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101686929 - 2¹⁶ = 2101621393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101686929.

It is not a weakly prime, because it can be changed into another prime (2101686989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050843464 + 1050843465.

It is an arithmetic number, because the mean of its divisors is an integer number (1050843465).

Almost surely, 2^2101686929 is an apocalyptic number.

It is an amenable number.

2101686929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101686929 is an equidigital number, since it uses as much as digits as its factorization.

2101686929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 2101686929 is about 45844.1591590466. The cubic root of 2101686929 is about 1280.9219694235.

The spelling of 2101686929 in words is "two billion, one hundred one million, six hundred eighty-six thousand, nine hundred twenty-nine".