8721772793 has 8 divisors (see below), whose sum is σ = 8966412360. Its totient is φ = 8477602560.

The previous prime is 8721772789. The next prime is 8721772817. The reversal of 8721772793 is 3972771278.

It can be written as a sum of positive squares in 4 ways, for example, as 396487744 + 8325285049 = 19912^2 + 91243^2 .

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 8721772793 - 2² = 8721772789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8721772723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79478 + ... + 154143.

It is an arithmetic number, because the mean of its divisors is an integer number (1120801545).

Almost surely, 2^8721772793 is an apocalyptic number.

It is an amenable number.

8721772793 is a deficient number, since it is larger than the sum of its proper divisors (244639567).

8721772793 is a wasteful number, since it uses less digits than its factorization.

8721772793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234667.

The product of its digits is 2074464, while the sum is 53.

The square root of 8721772793 is about 93390.4320206305. The cubic root of 8721772793 is about 2058.4244081381.

The spelling of 8721772793 in words is "eight billion, seven hundred twenty-one million, seven hundred seventy-two thousand, seven hundred ninety-three".