1983797 has 4 divisors (see below), whose sum is σ = 1987020. Its totient is φ = 1980576.

The previous prime is 1983767. The next prime is 1983833. The reversal of 1983797 is 7973891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7973891 = 2207 ⋅3613.

It can be written as a sum of positive squares in 2 ways, for example, as 461041 + 1522756 = 679^2 + 1234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1983797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983767) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 368 + ... + 2025.

It is an arithmetic number, because the mean of its divisors is an integer number (496755).

2^1983797 is an apocalyptic number.

It is an amenable number.

1983797 is a deficient number, since it is larger than the sum of its proper divisors (3223).

1983797 is an equidigital number, since it uses as much as digits as its factorization.

1983797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222.

The product of its digits is 95256, while the sum is 44.

The square root of 1983797 is about 1408.4732869316. The cubic root of 1983797 is about 125.6509403294.

The spelling of 1983797 in words is "one million, nine hundred eighty-three thousand, seven hundred ninety-seven".