2105699 has 2 divisors, whose sum is σ = 2105700. Its totient is φ = 2105698.

The previous prime is 2105693. The next prime is 2105717. The reversal of 2105699 is 9965012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105699 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2105693) 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 as a sum of consecutive naturals, namely, 1052849 + 1052850.

It is an arithmetic number, because the mean of its divisors is an integer number (1052850).

2^2105699 is an apocalyptic number.

2105699 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105699 is an equidigital number, since it uses as much as digits as its factorization.

2105699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 2105699 is about 1451.1026841681. The cubic root of 2105699 is about 128.1736534636.

The spelling of 2105699 in words is "two million, one hundred five thousand, six hundred ninety-nine".