2091682 has 4 divisors (see below), whose sum is σ = 3137526. Its totient is φ = 1045840.

The previous prime is 2091671. The next prime is 2091703. The reversal of 2091682 is 2861902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1962801 + 128881 = 1401^2 + 359^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2091682.

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 as a sum of consecutive naturals, namely, 522919 + ... + 522922.

2^2091682 is an apocalyptic number.

2091682 is a deficient number, since it is larger than the sum of its proper divisors (1045844).

2091682 is a wasteful number, since it uses less digits than its factorization.

2091682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045843.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2091682 is about 1446.2648443491. The cubic root of 2091682 is about 127.8886156677. Note that the first 3 decimals are identical.

It can be divided in two parts, 209 and 1682, that added together give a triangular number (1891 = T₆₁).

The spelling of 2091682 in words is "two million, ninety-one thousand, six hundred eighty-two".