2109916 has 12 divisors (see below), whose sum is σ = 3702888. Its totient is φ = 1051952.

The previous prime is 2109911. The next prime is 2109941. The reversal of 2109916 is 6199012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1755 + ... + 2701.

It is an arithmetic number, because the mean of its divisors is an integer number (308574).

2^2109916 is an apocalyptic number.

It is an amenable number.

2109916 is a deficient number, since it is larger than the sum of its proper divisors (1592972).

2109916 is a wasteful number, since it uses less digits than its factorization.

2109916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508 (or 1506 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 2109916 is about 1452.5549903532. The cubic root of 2109916 is about 128.2591591760.

It can be divided in two parts, 21099 and 16, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 2109916 in words is "two million, one hundred nine thousand, nine hundred sixteen".