2109966 has 8 divisors (see below), whose sum is σ = 4219944. Its totient is φ = 703320.

The previous prime is 2109959. The next prime is 2109973. The reversal of 2109966 is 6699012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2109959) and next prime (2109973).

It is a sphenic number, since it is the product of 3 distinct primes.

2109966 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 175825 + ... + 175836.

It is an arithmetic number, because the mean of its divisors is an integer number (527493).

2^2109966 is an apocalyptic number.

2109966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2109966 is a wasteful number, since it uses less digits than its factorization.

2109966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351666.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 2109966 is about 1452.5722013036. The cubic root of 2109966 is about 128.2601723138.

The spelling of 2109966 in words is "two million, one hundred nine thousand, nine hundred sixty-six".