2109959 has 2 divisors, whose sum is σ = 2109960. Its totient is φ = 2109958.

The previous prime is 2109949. The next prime is 2109973. The reversal of 2109959 is 9599012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2109959 - 2¹² = 2105863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2109949) 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, 1054979 + 1054980.

It is an arithmetic number, because the mean of its divisors is an integer number (1054980).

2^2109959 is an apocalyptic number.

2109959 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109959 is an equidigital number, since it uses as much as digits as its factorization.

2109959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 2109959 is about 1452.5697917828. The cubic root of 2109959 is about 128.2600304755.

The spelling of 2109959 in words is "two million, one hundred nine thousand, nine hundred fifty-nine".