7987535791 has 2 divisors, whose sum is σ = 7987535792. Its totient is φ = 7987535790.

The previous prime is 7987535789. The next prime is 7987535807. The reversal of 7987535791 is 1975357897.

It is a weak prime.

It is an emirp because it is prime and its reverse (1975357897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7987535791 - 2¹ = 7987535789 is a prime.

Together with 7987535789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7987535291) 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, 3993767895 + 3993767896.

It is an arithmetic number, because the mean of its divisors is an integer number (3993767896).

Almost surely, 2^7987535791 is an apocalyptic number.

7987535791 is a deficient number, since it is larger than the sum of its proper divisors (1).

7987535791 is an equidigital number, since it uses as much as digits as its factorization.

7987535791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16669800, while the sum is 61.

The square root of 7987535791 is about 89373.0148926397. The cubic root of 7987535791 is about 1998.9607760170.

The spelling of 7987535791 in words is "seven billion, nine hundred eighty-seven million, five hundred thirty-five thousand, seven hundred ninety-one".