2108929 has 2 divisors, whose sum is σ = 2108930. Its totient is φ = 2108928.

The previous prime is 2108927. The next prime is 2108941. The reversal of 2108929 is 9298012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2108304 + 625 = 1452^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 2108929 - 2¹ = 2108927 is a prime.

Together with 2108927, it forms a pair of twin primes.

2108929 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2108929.

It is not a weakly prime, because it can be changed into another prime (2108927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054464 + 1054465.

It is an arithmetic number, because the mean of its divisors is an integer number (1054465).

2^2108929 is an apocalyptic number.

It is an amenable number.

2108929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2108929 is an equidigital number, since it uses as much as digits as its factorization.

2108929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 2108929 is about 1452.2152044377. The cubic root of 2108929 is about 128.2391565574.

The spelling of 2108929 in words is "two million, one hundred eight thousand, nine hundred twenty-nine".