7987648061 has 2 divisors, whose sum is σ = 7987648062. Its totient is φ = 7987648060.

The previous prime is 7987648027. The next prime is 7987648069. The reversal of 7987648061 is 1608467897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4598196100 + 3389451961 = 67810^2 + 58219^2 .

It is a cyclic number.

It is not a de Polignac number, because 7987648061 - 2¹⁴ = 7987631677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7987647988 and 7987648006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7987648069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993824030 + 3993824031.

It is an arithmetic number, because the mean of its divisors is an integer number (3993824031).

Almost surely, 2^7987648061 is an apocalyptic number.

It is an amenable number.

7987648061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7987648061 is an equidigital number, since it uses as much as digits as its factorization.

7987648061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The square root of 7987648061 is about 89373.6429882994. The cubic root of 7987648061 is about 1998.9701415368.

The spelling of 7987648061 in words is "seven billion, nine hundred eighty-seven million, six hundred forty-eight thousand, sixty-one".