84126217989 has 8 divisors (see below), whose sum is σ = 122365408032. Its totient is φ = 50985586640.

The previous prime is 84126217961. The next prime is 84126217993. The reversal of 84126217989 is 98971262148.

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 84126217989 - 2¹⁷ = 84126086917 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84126217949) 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, 1274639634 + ... + 1274639699.

It is an arithmetic number, because the mean of its divisors is an integer number (15295676004).

Almost surely, 2^84126217989 is an apocalyptic number.

It is an amenable number.

84126217989 is a deficient number, since it is larger than the sum of its proper divisors (38239190043).

84126217989 is a wasteful number, since it uses less digits than its factorization.

84126217989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2549279347.

The product of its digits is 3483648, while the sum is 57.

The spelling of 84126217989 in words is "eighty-four billion, one hundred twenty-six million, two hundred seventeen thousand, nine hundred eighty-nine".