7930742081 has 2 divisors, whose sum is σ = 7930742082. Its totient is φ = 7930742080.

The previous prime is 7930742069. The next prime is 7930742087. The reversal of 7930742081 is 1802470397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6647956225 + 1282785856 = 81535^2 + 35816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7930742081 is a prime.

It is a super-2 number, since 2×7930742081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7930742087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3965371040 + 3965371041.

It is an arithmetic number, because the mean of its divisors is an integer number (3965371041).

Almost surely, 2^7930742081 is an apocalyptic number.

It is an amenable number.

7930742081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7930742081 is an equidigital number, since it uses as much as digits as its factorization.

7930742081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 7930742081 is about 89054.7139740508. The cubic root of 7930742081 is about 1994.2117711137.

The spelling of 7930742081 in words is "seven billion, nine hundred thirty million, seven hundred forty-two thousand, eighty-one".