87864382217 has 4 divisors (see below), whose sum is σ = 87865963536. Its totient is φ = 87862800900.

The previous prime is 87864382187. The next prime is 87864382223. The reversal of 87864382217 is 71228346878.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87864382217 - 2⁶ = 87864382153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87864387217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704159 + ... + 819492.

It is an arithmetic number, because the mean of its divisors is an integer number (21966490884).

Almost surely, 2^87864382217 is an apocalyptic number.

It is an amenable number.

87864382217 is a deficient number, since it is larger than the sum of its proper divisors (1581319).

87864382217 is a wasteful number, since it uses less digits than its factorization.

87864382217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581318.

The product of its digits is 7225344, while the sum is 56.

The spelling of 87864382217 in words is "eighty-seven billion, eight hundred sixty-four million, three hundred eighty-two thousand, two hundred seventeen".