84421197993 has 16 divisors (see below), whose sum is σ = 129257337600. Its totient is φ = 48471500880.

The previous prime is 84421197989. The next prime is 84421198007. The reversal of 84421197993 is 39979112448.

It is not a de Polignac number, because 84421197993 - 2² = 84421197989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (84421197493) 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, 67320903 + ... + 67322156.

It is an arithmetic number, because the mean of its divisors is an integer number (8078583600).

Almost surely, 2^84421197993 is an apocalyptic number.

It is an amenable number.

84421197993 is a deficient number, since it is larger than the sum of its proper divisors (44836139607).

84421197993 is a wasteful number, since it uses less digits than its factorization.

84421197993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134643092.

The product of its digits is 3919104, while the sum is 57.

The spelling of 84421197993 in words is "eighty-four billion, four hundred twenty-one million, one hundred ninety-seven thousand, nine hundred ninety-three".