1982117 has 4 divisors (see below), whose sum is σ = 2068320. Its totient is φ = 1895916.

The previous prime is 1982111. The next prime is 1982129. The reversal of 1982117 is 7112891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7112891 = 433 ⋅16427.

It is a cyclic number.

It is not a de Polignac number, because 1982117 - 2¹⁰ = 1981093 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1982117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982111) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 43067 + ... + 43112.

It is an arithmetic number, because the mean of its divisors is an integer number (517080).

2^1982117 is an apocalyptic number.

It is an amenable number.

1982117 is a deficient number, since it is larger than the sum of its proper divisors (86203).

1982117 is an equidigital number, since it uses as much as digits as its factorization.

1982117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86202.

The product of its digits is 1008, while the sum is 29.

The square root of 1982117 is about 1407.8767701756. The cubic root of 1982117 is about 125.6154606916.

The spelling of 1982117 in words is "one million, nine hundred eighty-two thousand, one hundred seventeen".