2105669 has 2 divisors, whose sum is σ = 2105670. Its totient is φ = 2105668.

The previous prime is 2105641. The next prime is 2105681. The reversal of 2105669 is 9665012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1562500 + 543169 = 1250^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105669 - 2⁸ = 2105413 is a prime.

It is a super-2 number, since 2×2105669² = 8867683875122, which contains 22 as substring.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 0 + 5 + 6 + 6⁵ + 9³ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052834 + 1052835.

It is an arithmetic number, because the mean of its divisors is an integer number (1052835).

2^2105669 is an apocalyptic number.

It is an amenable number.

2105669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105669 is an equidigital number, since it uses as much as digits as its factorization.

2105669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2105669 is about 1451.0923471647. The cubic root of 2105669 is about 128.1730447618.

The spelling of 2105669 in words is "two million, one hundred five thousand, six hundred sixty-nine".