87384321 has 6 divisors (see below), whose sum is σ = 126221810. Its totient is φ = 58256208.

The previous prime is 87384317. The next prime is 87384347. The reversal of 87384321 is 12348378.

It can be written as a sum of positive squares in only one way, i.e., 62583921 + 24800400 = 7911^2 + 4980^2 .

It is not a de Polignac number, because 87384321 - 2² = 87384317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87384361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4854676 + ... + 4854693.

Almost surely, 2^87384321 is an apocalyptic number.

It is an amenable number.

87384321 is a deficient number, since it is larger than the sum of its proper divisors (38837489).

87384321 is a wasteful number, since it uses less digits than its factorization.

87384321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9709375 (or 9709372 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 87384321 is about 9347.9581192900. The cubic root of 87384321 is about 443.7562729788.

The spelling of 87384321 in words is "eighty-seven million, three hundred eighty-four thousand, three hundred twenty-one".