8915720443 has 4 divisors (see below), whose sum is σ = 10189394800. Its totient is φ = 7642046088.

The previous prime is 8915720369. The next prime is 8915720519. The reversal of 8915720443 is 3440275198.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3440275198 = 2 ⋅1720137599.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8915720443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8915720443.

It is not an unprimeable number, because it can be changed into a prime (8915720743) 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, 636837168 + ... + 636837181.

It is an arithmetic number, because the mean of its divisors is an integer number (2547348700).

Almost surely, 2^8915720443 is an apocalyptic number.

8915720443 is a deficient number, since it is larger than the sum of its proper divisors (1273674357).

8915720443 is a wasteful number, since it uses less digits than its factorization.

8915720443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273674356.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 8915720443 is about 94423.0927421889. The cubic root of 8915720443 is about 2073.5705405557.

The spelling of 8915720443 in words is "eight billion, nine hundred fifteen million, seven hundred twenty thousand, four hundred forty-three".