2102917 has 4 divisors (see below), whose sum is σ = 2226636. Its totient is φ = 1979200.

The previous prime is 2102897. The next prime is 2102927. The reversal of 2102917 is 7192012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 923521 + 1179396 = 961^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102917 - 2¹¹ = 2100869 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102927) 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, 61834 + ... + 61867.

It is an arithmetic number, because the mean of its divisors is an integer number (556659).

2^2102917 is an apocalyptic number.

It is an amenable number.

2102917 is a deficient number, since it is larger than the sum of its proper divisors (123719).

2102917 is a wasteful number, since it uses less digits than its factorization.

2102917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123718.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 2102917 is about 1450.1437859743. The cubic root of 2102917 is about 128.1171819144.

Adding to 2102917 its reverse (7192012), we get a palindrome (9294929).

The spelling of 2102917 in words is "two million, one hundred two thousand, nine hundred seventeen".