1982611 has 2 divisors, whose sum is σ = 1982612. Its totient is φ = 1982610.

The previous prime is 1982609. The next prime is 1982627. The reversal of 1982611 is 1162891.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1982611 - 2¹ = 1982609 is a prime.

Together with 1982609, it forms a pair of twin primes.

1982611 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1982611.

It is not a weakly prime, because it can be changed into another prime (1982641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991305 + 991306.

It is an arithmetic number, because the mean of its divisors is an integer number (991306).

2^1982611 is an apocalyptic number.

1982611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982611 is an equidigital number, since it uses as much as digits as its factorization.

1982611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 28.

The square root of 1982611 is about 1408.0522007369. The cubic root of 1982611 is about 125.6258954748.

It can be divided in two parts, 198 and 2611, that added together give a square (2809 = 53²).

The spelling of 1982611 in words is "one million, nine hundred eighty-two thousand, six hundred eleven".