87261303709 has 2 divisors, whose sum is σ = 87261303710. Its totient is φ = 87261303708.

The previous prime is 87261303707. The next prime is 87261303719. The reversal of 87261303709 is 90730316278.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55585135225 + 31676168484 = 235765^2 + 177978^2 .

It is a cyclic number.

It is not a de Polignac number, because 87261303709 - 2¹ = 87261303707 is a prime.

It is a super-2 number, since 2×87261303709² (a number of 23 digits) contains 22 as substring.

Together with 87261303707, 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 (87261303707) 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, 43630651854 + 43630651855.

It is an arithmetic number, because the mean of its divisors is an integer number (43630651855).

Almost surely, 2^87261303709 is an apocalyptic number.

It is an amenable number.

87261303709 is a deficient number, since it is larger than the sum of its proper divisors (1).

87261303709 is an equidigital number, since it uses as much as digits as its factorization.

87261303709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 87261303709 in words is "eighty-seven billion, two hundred sixty-one million, three hundred three thousand, seven hundred nine".