84031288871 has 4 divisors (see below), whose sum is σ = 86080832544. Its totient is φ = 81981745200.

The previous prime is 84031288867. The next prime is 84031288883. The reversal of 84031288871 is 17888213048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84031288871 - 2² = 84031288867 is a prime.

It is a super-2 number, since 2×84031288871² (a number of 23 digits) 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 (84031288571) 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 3 ways as a sum of consecutive naturals, for example, 1024771775 + ... + 1024771856.

It is an arithmetic number, because the mean of its divisors is an integer number (21520208136).

Almost surely, 2^84031288871 is an apocalyptic number.

84031288871 is a deficient number, since it is larger than the sum of its proper divisors (2049543673).

84031288871 is a wasteful number, since it uses less digits than its factorization.

84031288871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049543672.

The product of its (nonzero) digits is 688128, while the sum is 50.

The spelling of 84031288871 in words is "eighty-four billion, thirty-one million, two hundred eighty-eight thousand, eight hundred seventy-one".