87870288217 has 2 divisors, whose sum is σ = 87870288218. Its totient is φ = 87870288216.

The previous prime is 87870288169. The next prime is 87870288263. The reversal of 87870288217 is 71288207878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48217133056 + 39653155161 = 219584^2 + 199131^2 .

It is a cyclic number.

It is not a de Polignac number, because 87870288217 - 2⁷ = 87870288089 is a prime.

It is not a weakly prime, because it can be changed into another prime (87870288277) 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, 43935144108 + 43935144109.

It is an arithmetic number, because the mean of its divisors is an integer number (43935144109).

Almost surely, 2^87870288217 is an apocalyptic number.

It is an amenable number.

87870288217 is a deficient number, since it is larger than the sum of its proper divisors (1).

87870288217 is an equidigital number, since it uses as much as digits as its factorization.

87870288217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5619712, while the sum is 58.

The spelling of 87870288217 in words is "eighty-seven billion, eight hundred seventy million, two hundred eighty-eight thousand, two hundred seventeen".