7987260509 has 2 divisors, whose sum is σ = 7987260510. Its totient is φ = 7987260508.

The previous prime is 7987260461. The next prime is 7987260521. The reversal of 7987260509 is 9050627897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6070747225 + 1916513284 = 77915^2 + 43778^2 .

It is a cyclic number.

It is not a de Polignac number, because 7987260509 - 2²⁴ = 7970483293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7987200509) 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, 3993630254 + 3993630255.

It is an arithmetic number, because the mean of its divisors is an integer number (3993630255).

Almost surely, 2^7987260509 is an apocalyptic number.

It is an amenable number.

7987260509 is a deficient number, since it is larger than the sum of its proper divisors (1).

7987260509 is an equidigital number, since it uses as much as digits as its factorization.

7987260509 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 7987260509 is about 89371.4748060028. The cubic root of 7987260509 is about 1998.9378117279.

The spelling of 7987260509 in words is "seven billion, nine hundred eighty-seven million, two hundred sixty thousand, five hundred nine".