1999982 has 16 divisors (see below), whose sum is σ = 3233520. Its totient is φ = 924288.

The previous prime is 1999979. The next prime is 1999993. The reversal of 1999982 is 2899991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1508 + ... + 2504.

It is an arithmetic number, because the mean of its divisors is an integer number (202095).

2^1999982 is an apocalyptic number.

1999982 is a deficient number, since it is larger than the sum of its proper divisors (1233538).

1999982 is a wasteful number, since it uses less digits than its factorization.

1999982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075.

The product of its digits is 104976, while the sum is 47.

The square root of 1999982 is about 1414.2071983977. The cubic root of 1999982 is about 125.9917270120.

Subtracting 1999982 from its reverse (2899991), we obtain a palindrome (900009).

It can be divided in two parts, 19 and 99982, that added together give a palindrome (100001).

The spelling of 1999982 in words is "one million, nine hundred ninety-nine thousand, nine hundred eighty-two".