2091916 has 12 divisors (see below), whose sum is σ = 3683232. Its totient is φ = 1039568.

The previous prime is 2091913. The next prime is 2091917. The reversal of 2091916 is 6191902.

It is a super-2 number, since 2×2091916² = 8752225102112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2091913) 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, 820 + ... + 2203.

It is an arithmetic number, because the mean of its divisors is an integer number (306936).

2^2091916 is an apocalyptic number.

It is an amenable number.

2091916 is a deficient number, since it is larger than the sum of its proper divisors (1591316).

2091916 is a wasteful number, since it uses less digits than its factorization.

2091916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200 (or 3198 counting only the distinct ones).

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

The square root of 2091916 is about 1446.3457401327. The cubic root of 2091916 is about 127.8933845284.

The spelling of 2091916 in words is "two million, ninety-one thousand, nine hundred sixteen".