2091964 has 12 divisors (see below), whose sum is σ = 4183984. Its totient is φ = 896544.

The previous prime is 2091959. The next prime is 2091983. The reversal of 2091964 is 4691902.

2091964 = 17² + 18² + ... + 184².

It is a happy number.

2091964 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

2091964 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37329 + ... + 37384.

2^2091964 is an apocalyptic number.

It is an amenable number.

2091964 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.

2091964 is a wasteful number, since it uses less digits than its factorization.

2091964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74724 (or 74722 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2091964 is about 1446.3623335804. The cubic root of 2091964 is about 127.8943627122.

The spelling of 2091964 in words is "two million, ninety-one thousand, nine hundred sixty-four".