1983899 has 4 divisors (see below), whose sum is σ = 2006280. Its totient is φ = 1961520.

The previous prime is 1983889. The next prime is 1983913. The reversal of 1983899 is 9983891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1983899 - 2⁸ = 1983643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1983859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11057 + ... + 11234.

It is an arithmetic number, because the mean of its divisors is an integer number (501570).

2^1983899 is an apocalyptic number.

1983899 is a deficient number, since it is larger than the sum of its proper divisors (22381).

1983899 is an equidigital number, since it uses as much as digits as its factorization.

1983899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22380.

The product of its digits is 139968, while the sum is 47.

The square root of 1983899 is about 1408.5094958856. The cubic root of 1983899 is about 125.6530938051.

It can be divided in two parts, 1983 and 899, that added together give a palindrome (2882).

The spelling of 1983899 in words is "one million, nine hundred eighty-three thousand, eight hundred ninety-nine".