7973968481 has 2 divisors, whose sum is σ = 7973968482. Its totient is φ = 7973968480.

The previous prime is 7973968477. The next prime is 7973968487. The reversal of 7973968481 is 1848693797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7835082256 + 138886225 = 88516^2 + 11785^2 .

It is a cyclic number.

It is not a de Polignac number, because 7973968481 - 2² = 7973968477 is a prime.

It is a super-2 number, since 2×7973968481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7973968487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3986984240 + 3986984241.

It is an arithmetic number, because the mean of its divisors is an integer number (3986984241).

Almost surely, 2^7973968481 is an apocalyptic number.

It is an amenable number.

7973968481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7973968481 is an equidigital number, since it uses as much as digits as its factorization.

7973968481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 62.

The square root of 7973968481 is about 89297.0799130632. The cubic root of 7973968481 is about 1997.8283495707.

The spelling of 7973968481 in words is "seven billion, nine hundred seventy-three million, nine hundred sixty-eight thousand, four hundred eighty-one".