1983147 has 4 divisors (see below), whose sum is σ = 2644200. Its totient is φ = 1322096.

The previous prime is 1983143. The next prime is 1983197. The reversal of 1983147 is 7413891.

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 1983147 - 2² = 1983143 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1983143) 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, 330522 + ... + 330527.

It is an arithmetic number, because the mean of its divisors is an integer number (661050).

2^1983147 is an apocalyptic number.

1983147 is a deficient number, since it is larger than the sum of its proper divisors (661053).

1983147 is an equidigital number, since it uses as much as digits as its factorization.

1983147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661052.

The product of its digits is 6048, while the sum is 33.

The square root of 1983147 is about 1408.2425217270. The cubic root of 1983147 is about 125.6372154652.

The spelling of 1983147 in words is "one million, nine hundred eighty-three thousand, one hundred forty-seven".