2100917 has 8 divisors (see below), whose sum is σ = 2585856. Its totient is φ = 1662192.

The previous prime is 2100913. The next prime is 2100929. The reversal of 2100917 is 7190012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2100917 - 2² = 2100913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11453 + ... + 11634.

It is an arithmetic number, because the mean of its divisors is an integer number (323232).

2^2100917 is an apocalyptic number.

It is an amenable number.

2100917 is a deficient number, since it is larger than the sum of its proper divisors (484939).

2100917 is a wasteful number, since it uses less digits than its factorization.

2100917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23107.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 2100917 is about 1449.4540351456. The cubic root of 2100917 is about 128.0765533275.

Adding to 2100917 its reverse (7190012), we get a palindrome (9290929).

The spelling of 2100917 in words is "two million, one hundred thousand, nine hundred seventeen".