8720693863 has 4 divisors (see below), whose sum is σ = 9966507280. Its totient is φ = 7474880448.

The previous prime is 8720693857. The next prime is 8720693909. The reversal of 8720693863 is 3683960278.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8720693863 - 2²⁵ = 8687139431 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 8720693863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720693833) 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, 622906698 + ... + 622906711.

It is an arithmetic number, because the mean of its divisors is an integer number (2491626820).

Almost surely, 2^8720693863 is an apocalyptic number.

8720693863 is a deficient number, since it is larger than the sum of its proper divisors (1245813417).

8720693863 is a wasteful number, since it uses less digits than its factorization.

8720693863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245813416.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The square root of 8720693863 is about 93384.6553936995. The cubic root of 8720693863 is about 2058.3395252638.

The spelling of 8720693863 in words is "eight billion, seven hundred twenty million, six hundred ninety-three thousand, eight hundred sixty-three".