2105717 has 2 divisors, whose sum is σ = 2105718. Its totient is φ = 2105716.

The previous prime is 2105699. The next prime is 2105729. The reversal of 2105717 is 7175012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1976836 + 128881 = 1406^2 + 359^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105717 - 2¹² = 2101621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105692 and 2105701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052858 + 1052859.

It is an arithmetic number, because the mean of its divisors is an integer number (1052859).

2^2105717 is an apocalyptic number.

It is an amenable number.

2105717 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105717 is an equidigital number, since it uses as much as digits as its factorization.

2105717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 2105717 is about 1451.1088863349. The cubic root of 2105717 is about 128.1740186818.

The spelling of 2105717 in words is "two million, one hundred five thousand, seven hundred seventeen".