87000380880509 has 2 divisors, whose sum is σ = 87000380880510. Its totient is φ = 87000380880508.

The previous prime is 87000380880493. The next prime is 87000380880527. The reversal of 87000380880509 is 90508808300078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46816001897284 + 40184378983225 = 6842222^2 + 6339115^2 .

It is a cyclic number.

It is not a de Polignac number, because 87000380880509 - 2⁴ = 87000380880493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87000380883509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43500190440254 + 43500190440255.

It is an arithmetic number, because the mean of its divisors is an integer number (43500190440255).

Almost surely, 2^{87000380880509} is an apocalyptic number.

It is an amenable number.

87000380880509 is a deficient number, since it is larger than the sum of its proper divisors (1).

87000380880509 is an equidigital number, since it uses as much as digits as its factorization.

87000380880509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 56.

The spelling of 87000380880509 in words is "eighty-seven trillion, three hundred eighty million, eight hundred eighty thousand, five hundred nine".