87384431 has 8 divisors (see below), whose sum is σ = 88966944. Its totient is φ = 85812480.

The previous prime is 87384389. The next prime is 87384481. The reversal of 87384431 is 13448378.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87384431 is a prime.

It is a super-2 number, since 2×87384431² = 15272077562387522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87384481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15110 + ... + 20076.

It is an arithmetic number, because the mean of its divisors is an integer number (11120868).

Almost surely, 2^87384431 is an apocalyptic number.

87384431 is a deficient number, since it is larger than the sum of its proper divisors (1582513).

87384431 is a wasteful number, since it uses less digits than its factorization.

87384431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5281.

The product of its digits is 64512, while the sum is 38.

The square root of 87384431 is about 9347.9640029260. The cubic root of 87384431 is about 443.7564591799.

The spelling of 87384431 in words is "eighty-seven million, three hundred eighty-four thousand, four hundred thirty-one".