84391104879 has 16 divisors (see below), whose sum is σ = 130459680000. Its totient is φ = 53814617208.

The previous prime is 84391104859. The next prime is 84391104883. The reversal of 84391104879 is 97840119348.

84391104879 is a `hidden beast` number, since 8 + 43 + 9 + 110 + 487 + 9 = 666.

It is not a de Polignac number, because 84391104879 - 2¹⁹ = 84390580591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84391104859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67947129 + ... + 67948370.

It is an arithmetic number, because the mean of its divisors is an integer number (8153730000).

Almost surely, 2^84391104879 is an apocalyptic number.

84391104879 is a deficient number, since it is larger than the sum of its proper divisors (46068575121).

84391104879 is a wasteful number, since it uses less digits than its factorization.

84391104879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135895531 (or 135895525 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 84391104879 in words is "eighty-four billion, three hundred ninety-one million, one hundred four thousand, eight hundred seventy-nine".