8921719245 has 32 divisors (see below), whose sum is σ = 14921809920. Its totient is φ = 4546451520.

The previous prime is 8921719241. The next prime is 8921719259. The reversal of 8921719245 is 5429171298.

It is a happy number.

It is not a de Polignac number, because 8921719245 - 2² = 8921719241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8921719194 and 8921719203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8921719241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84699 + ... + 158168.

It is an arithmetic number, because the mean of its divisors is an integer number (466306560).

Almost surely, 2^8921719245 is an apocalyptic number.

It is an amenable number.

8921719245 is a deficient number, since it is larger than the sum of its proper divisors (6000090675).

8921719245 is a wasteful number, since it uses less digits than its factorization.

8921719245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242985.

The product of its digits is 362880, while the sum is 48.

The square root of 8921719245 is about 94454.8529457328. The cubic root of 8921719245 is about 2074.0354927132.

The spelling of 8921719245 in words is "eight billion, nine hundred twenty-one million, seven hundred nineteen thousand, two hundred forty-five".