8712428921 has 8 divisors (see below), whose sum is σ = 10033070784. Its totient is φ = 7410789360.

The previous prime is 8712428863. The next prime is 8712428927. The reversal of 8712428921 is 1298242178.

8712428921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8712428921 - 2¹⁰ = 8712427897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8712428927) 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 7 ways as a sum of consecutive naturals, for example, 4749590 + ... + 4751423.

It is an arithmetic number, because the mean of its divisors is an integer number (1254133848).

Almost surely, 2^8712428921 is an apocalyptic number.

It is an amenable number.

8712428921 is a deficient number, since it is larger than the sum of its proper divisors (1320641863).

8712428921 is a wasteful number, since it uses less digits than its factorization.

8712428921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9501151.

The product of its digits is 129024, while the sum is 44.

The square root of 8712428921 is about 93340.3927621906. The cubic root of 8712428921 is about 2057.6890634916.

The spelling of 8712428921 in words is "eight billion, seven hundred twelve million, four hundred twenty-eight thousand, nine hundred twenty-one".