1983975 has 24 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 906720.

The previous prime is 1983967. The next prime is 1983979. The reversal of 1983975 is 5793891.

It is a happy number.

It is not a de Polignac number, because 1983975 - 2³ = 1983967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983979) 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 23 ways as a sum of consecutive naturals, for example, 1365 + ... + 2414.

It is an arithmetic number, because the mean of its divisors is an integer number (156240).

2^1983975 is an apocalyptic number.

1983975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1983975 is a deficient number, since it is larger than the sum of its proper divisors (1765785).

1983975 is a wasteful number, since it uses less digits than its factorization.

1983975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799 (or 3794 counting only the distinct ones).

The product of its digits is 68040, while the sum is 42.

The square root of 1983975 is about 1408.5364745011. The cubic root of 1983975 is about 125.6546983077.

The spelling of 1983975 in words is "one million, nine hundred eighty-three thousand, nine hundred seventy-five".