1983282981 has 4 divisors (see below), whose sum is σ = 2644377312. Its totient is φ = 1322188652.

The previous prime is 1983282979. The next prime is 1983283007. The reversal of 1983282981 is 1892823891.

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.

It is a cyclic number.

It is not a de Polignac number, because 1983282981 - 2¹ = 1983282979 is a prime.

It is a super-2 number, since 2×1983282981² = 7866822765448492722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983282901) 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, 330547161 + ... + 330547166.

It is an arithmetic number, because the mean of its divisors is an integer number (661094328).

Almost surely, 2^1983282981 is an apocalyptic number.

It is an amenable number.

1983282981 is a deficient number, since it is larger than the sum of its proper divisors (661094331).

1983282981 is an equidigital number, since it uses as much as digits as its factorization.

1983282981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661094330.

The product of its digits is 497664, while the sum is 51.

The square root of 1983282981 is about 44534.0653994220. The cubic root of 1983282981 is about 1256.4008697595.

The spelling of 1983282981 in words is "one billion, nine hundred eighty-three million, two hundred eighty-two thousand, nine hundred eighty-one".