87305765291 has 2 divisors, whose sum is σ = 87305765292. Its totient is φ = 87305765290.

The previous prime is 87305765257. The next prime is 87305765321. The reversal of 87305765291 is 19256750378.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87305765291 is a prime.

It is not a weakly prime, because it can be changed into another prime (87305765201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43652882645 + 43652882646.

It is an arithmetic number, because the mean of its divisors is an integer number (43652882646).

Almost surely, 2^87305765291 is an apocalyptic number.

87305765291 is a deficient number, since it is larger than the sum of its proper divisors (1).

87305765291 is an equidigital number, since it uses as much as digits as its factorization.

87305765291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 87305765291 in words is "eighty-seven billion, three hundred five million, seven hundred sixty-five thousand, two hundred ninety-one".