2101688 has 16 divisors (see below), whose sum is σ = 4077000. Its totient is φ = 1014496.

The previous prime is 2101681. The next prime is 2101703. The reversal of 2101688 is 8861012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4298 + ... + 4761.

2^2101688 is an apocalyptic number.

It is an amenable number.

2101688 is a deficient number, since it is larger than the sum of its proper divisors (1975312).

2101688 is a wasteful number, since it uses less digits than its factorization.

2101688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9094 (or 9090 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 2101688 is about 1449.7199729603. The cubic root of 2101688 is about 128.0922187005.

The spelling of 2101688 in words is "two million, one hundred one thousand, six hundred eighty-eight".