2091604 has 12 divisors (see below), whose sum is σ = 3707200. Its totient is φ = 1032408.

The previous prime is 2091599. The next prime is 2091613. The reversal of 2091604 is 4061902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2994 + ... + 3625.

2^2091604 is an apocalyptic number.

It is an amenable number.

2091604 is a deficient number, since it is larger than the sum of its proper divisors (1615596).

2091604 is a wasteful number, since it uses less digits than its factorization.

2091604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6702 (or 6700 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2091604 is about 1446.2378780823. The cubic root of 2091604 is about 127.8870259684.

The spelling of 2091604 in words is "two million, ninety-one thousand, six hundred four".