1982583981 has 12 divisors (see below), whose sum is σ = 3272837152. Its totient is φ = 1132905096.

The previous prime is 1982583973. The next prime is 1982583989. The reversal of 1982583981 is 1893852891.

It is an interprime number because it is at equal distance from previous prime (1982583973) and next prime (1982583989).

It is not a de Polignac number, because 1982583981 - 2³ = 1982583973 is a prime.

It is a super-2 number, since 2×1982583981² = 7861278483435616722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982583989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15734731 + ... + 15734856.

Almost surely, 2^1982583981 is an apocalyptic number.

It is an amenable number.

1982583981 is a deficient number, since it is larger than the sum of its proper divisors (1290253171).

1982583981 is a wasteful number, since it uses less digits than its factorization.

1982583981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31469600 (or 31469597 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 1982583981 is about 44526.2167829246. The cubic root of 1982583981 is about 1256.2532479607.

The spelling of 1982583981 in words is "one billion, nine hundred eighty-two million, five hundred eighty-three thousand, nine hundred eighty-one".