84188393609 has 4 divisors (see below), whose sum is σ = 84499052160. Its totient is φ = 83877735060.

The previous prime is 84188393591. The next prime is 84188393629. The reversal of 84188393609 is 90639388148.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84188393609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84188393629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155328869 + ... + 155329410.

It is an arithmetic number, because the mean of its divisors is an integer number (21124763040).

Almost surely, 2^84188393609 is an apocalyptic number.

It is an amenable number.

84188393609 is a deficient number, since it is larger than the sum of its proper divisors (310658551).

84188393609 is a wasteful number, since it uses less digits than its factorization.

84188393609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310658550.

The product of its (nonzero) digits is 8957952, while the sum is 59.

The spelling of 84188393609 in words is "eighty-four billion, one hundred eighty-eight million, three hundred ninety-three thousand, six hundred nine".