1689682 has 4 divisors (see below), whose sum is σ = 2534526. Its totient is φ = 844840.

The previous prime is 1689661. The next prime is 1689703. The reversal of 1689682 is 2869861.

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

It is an interprime number because it is at equal distance from previous prime (1689661) and next prime (1689703).

It can be written as a sum of positive squares in only one way, i.e., 1212201 + 477481 = 1101^2 + 691^2 .

It is a super-2 number, since 2×1689682² = 5710050522248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422419 + ... + 422422.

2^1689682 is an apocalyptic number.

1689682 is a deficient number, since it is larger than the sum of its proper divisors (844844).

1689682 is an equidigital number, since it uses as much as digits as its factorization.

1689682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844843.

The product of its digits is 41472, while the sum is 40.

The square root of 1689682 is about 1299.8776865536. The cubic root of 1689682 is about 119.1063710053.

It can be divided in two parts, 16 and 89682, that added together give a palindrome (89698).

The spelling of 1689682 in words is "one million, six hundred eighty-nine thousand, six hundred eighty-two".