2123717 has 4 divisors (see below), whose sum is σ = 2192256. Its totient is φ = 2055180.

The previous prime is 2123707. The next prime is 2123731. The reversal of 2123717 is 7173212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2123717 - 2⁴ = 2123701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123692 and 2123701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34223 + ... + 34284.

It is an arithmetic number, because the mean of its divisors is an integer number (548064).

2^2123717 is an apocalyptic number.

It is an amenable number.

2123717 is a deficient number, since it is larger than the sum of its proper divisors (68539).

2123717 is an equidigital number, since it uses as much as digits as its factorization.

2123717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68538.

The product of its digits is 588, while the sum is 23.

The square root of 2123717 is about 1457.2978418978. The cubic root of 2123717 is about 128.5382001726.

Adding to 2123717 its reverse (7173212), we get a palindrome (9296929).

The spelling of 2123717 in words is "two million, one hundred twenty-three thousand, seven hundred seventeen".