2116917 has 12 divisors (see below), whose sum is σ = 3335904. Its totient is φ = 1282920.

The previous prime is 2116903. The next prime is 2116921. The reversal of 2116917 is 7196112.

It is not a de Polignac number, because 2116917 - 2⁴ = 2116901 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10593 + ... + 10790.

It is an arithmetic number, because the mean of its divisors is an integer number (277992).

2^2116917 is an apocalyptic number.

It is an amenable number.

2116917 is a deficient number, since it is larger than the sum of its proper divisors (1218987).

2116917 is a wasteful number, since it uses less digits than its factorization.

2116917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21400 (or 21397 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 2116917 is about 1454.9628861246. The cubic root of 2116917 is about 128.4008632428.

The spelling of 2116917 in words is "two million, one hundred sixteen thousand, nine hundred seventeen".