2164689 has 12 divisors (see below), whose sum is σ = 3291600. Its totient is φ = 1367064.

The previous prime is 2164681. The next prime is 2164739. The reversal of 2164689 is 9864612.

2164689 is a `hidden beast` number, since 2 + 1 + 646 + 8 + 9 = 666.

It is not a de Polignac number, because 2164689 - 2³ = 2164681 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

2164689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2164681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6159 + ... + 6500.

It is an arithmetic number, because the mean of its divisors is an integer number (274300).

2^2164689 is an apocalyptic number.

It is an amenable number.

2164689 is a deficient number, since it is larger than the sum of its proper divisors (1126911).

2164689 is a wasteful number, since it uses less digits than its factorization.

2164689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12684 (or 12681 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 2164689 is about 1471.2882110586. The cubic root of 2164689 is about 129.3595521708.

The spelling of 2164689 in words is "two million, one hundred sixty-four thousand, six hundred eighty-nine".