1983147897 has 4 divisors (see below), whose sum is σ = 2644197200. Its totient is φ = 1322098596.

The previous prime is 1983147871. The next prime is 1983147899. The reversal of 1983147897 is 7987413891.

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: 7987413891 = 3 ⋅2662471297.

It is not a de Polignac number, because 1983147897 - 2⁸ = 1983147641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1983147899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330524647 + ... + 330524652.

It is an arithmetic number, because the mean of its divisors is an integer number (661049300).

Almost surely, 2^1983147897 is an apocalyptic number.

It is an amenable number.

1983147897 is a deficient number, since it is larger than the sum of its proper divisors (661049303).

1983147897 is an equidigital number, since it uses as much as digits as its factorization.

1983147897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661049302.

The product of its digits is 3048192, while the sum is 57.

The square root of 1983147897 is about 44532.5487368509. The cubic root of 1983147897 is about 1256.3723440759.

The spelling of 1983147897 in words is "one billion, nine hundred eighty-three million, one hundred forty-seven thousand, eight hundred ninety-seven".