84239867281 has 8 divisors (see below), whose sum is σ = 84752103744. Its totient is φ = 83727724080.

The previous prime is 84239867249. The next prime is 84239867293. The reversal of 84239867281 is 18276893248.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84239867281 - 2⁵ = 84239867249 is a prime.

It is a super-2 number, since 2×84239867281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84233867281) 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 in 7 ways as a sum of consecutive naturals, for example, 2873011 + ... + 2902183.

It is an arithmetic number, because the mean of its divisors is an integer number (10594012968).

Almost surely, 2^84239867281 is an apocalyptic number.

It is an amenable number.

84239867281 is a deficient number, since it is larger than the sum of its proper divisors (512236463).

84239867281 is a wasteful number, since it uses less digits than its factorization.

84239867281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46631.

The product of its digits is 9289728, while the sum is 58.

The spelling of 84239867281 in words is "eighty-four billion, two hundred thirty-nine million, eight hundred sixty-seven thousand, two hundred eighty-one".