9168686421 has 4 divisors (see below), whose sum is σ = 12224915232. Its totient is φ = 6112457612.

The previous prime is 9168686389. The next prime is 9168686437. The reversal of 9168686421 is 1246868619.

9168686421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 9168686421 - 2⁵ = 9168686389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9168686521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1528114401 + ... + 1528114406.

It is an arithmetic number, because the mean of its divisors is an integer number (3056228808).

Almost surely, 2^9168686421 is an apocalyptic number.

It is an amenable number.

9168686421 is a deficient number, since it is larger than the sum of its proper divisors (3056228811).

9168686421 is a wasteful number, since it uses less digits than its factorization.

9168686421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056228810.

The product of its digits is 995328, while the sum is 51.

The square root of 9168686421 is about 95753.2580176779. The cubic root of 9168686421 is about 2092.9990917628. Note that the first 3 decimals are identical.

The spelling of 9168686421 in words is "nine billion, one hundred sixty-eight million, six hundred eighty-six thousand, four hundred twenty-one".