1990682 has 4 divisors (see below), whose sum is σ = 2986026. Its totient is φ = 995340.

The previous prime is 1990679. The next prime is 1990691. The reversal of 1990682 is 2860991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2860991 = 7 ⋅408713.

It can be written as a sum of positive squares in only one way, i.e., 1907161 + 83521 = 1381^2 + 289^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497669 + ... + 497672.

2^1990682 is an apocalyptic number.

1990682 is a deficient number, since it is larger than the sum of its proper divisors (995344).

1990682 is an equidigital number, since it uses as much as digits as its factorization.

1990682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995343.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1990682 is about 1410.9153057501. The cubic root of 1990682 is about 125.7961345926.

The spelling of 1990682 in words is "one million, nine hundred ninety thousand, six hundred eighty-two".