8238672921 has 8 divisors (see below), whose sum is σ = 11123946880. Its totient is φ = 5422923792.

The previous prime is 8238672917. The next prime is 8238672931. The reversal of 8238672921 is 1292768328.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8238672921 - 2² = 8238672917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8238672931) 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, 17380930 + ... + 17381403.

It is an arithmetic number, because the mean of its divisors is an integer number (1390493360).

Almost surely, 2^8238672921 is an apocalyptic number.

It is an amenable number.

8238672921 is a deficient number, since it is larger than the sum of its proper divisors (2885273959).

8238672921 is a wasteful number, since it uses less digits than its factorization.

8238672921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34762415.

The product of its digits is 580608, while the sum is 48.

The square root of 8238672921 is about 90767.1356879790. The cubic root of 8238672921 is about 2019.6948303001.

The spelling of 8238672921 in words is "eight billion, two hundred thirty-eight million, six hundred seventy-two thousand, nine hundred twenty-one".