7973954081 has 2 divisors, whose sum is σ = 7973954082. Its totient is φ = 7973954080.

The previous prime is 7973954063. The next prime is 7973954117. The reversal of 7973954081 is 1804593797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4483507681 + 3490446400 = 66959^2 + 59080^2 .

It is an emirp because it is prime and its reverse (1804593797) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7973954081 is a prime.

It is a super-2 number, since 2×7973954081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7973954581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3986977040 + 3986977041.

It is an arithmetic number, because the mean of its divisors is an integer number (3986977041).

Almost surely, 2^7973954081 is an apocalyptic number.

It is an amenable number.

7973954081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7973954081 is an equidigital number, since it uses as much as digits as its factorization.

7973954081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 7973954081 is about 89296.9992832906. Note that the first 3 decimals coincide. The cubic root of 7973954081 is about 1997.8271469597.

The spelling of 7973954081 in words is "seven billion, nine hundred seventy-three million, nine hundred fifty-four thousand, eighty-one".