1972983681 has 12 divisors (see below), whose sum is σ = 2850304080. Its totient is φ = 1315119960.

The previous prime is 1972983619. The next prime is 1972983721. The reversal of 1972983681 is 1863892791.

1972983681 is a `hidden beast` number, since 197 + 2 + 98 + 368 + 1 = 666.

It is not a de Polignac number, because 1972983681 - 2²² = 1968789377 is a prime.

It is a super-2 number, since 2×1972983681² = 7785329210984619522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1972983281) 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, 66526 + ... + 91496.

It is an arithmetic number, because the mean of its divisors is an integer number (237525340).

Almost surely, 2^1972983681 is an apocalyptic number.

It is an amenable number.

1972983681 is a deficient number, since it is larger than the sum of its proper divisors (877320399).

1972983681 is a wasteful number, since it uses less digits than its factorization.

1972983681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33756 (or 33753 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 1972983681 is about 44418.2809325170. The cubic root of 1972983681 is about 1254.2222407022. Note that the first 4 decimals are identical.

The spelling of 1972983681 in words is "one billion, nine hundred seventy-two million, nine hundred eighty-three thousand, six hundred eighty-one".