2117684 has 6 divisors (see below), whose sum is σ = 3705954. Its totient is φ = 1058840.

The previous prime is 2117677. The next prime is 2117699. The reversal of 2117684 is 4867112.

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 1056784 = 1030^2 + 1028^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264707 + ... + 264714.

It is an arithmetic number, because the mean of its divisors is an integer number (617659).

2^2117684 is an apocalyptic number.

It is an amenable number.

2117684 is a deficient number, since it is larger than the sum of its proper divisors (1588270).

2117684 is a wasteful number, since it uses less digits than its factorization.

2117684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529425 (or 529423 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 2117684 is about 1455.2264428604. The cubic root of 2117684 is about 128.4163687429.

The spelling of 2117684 in words is "two million, one hundred seventeen thousand, six hundred eighty-four".