8722279 has 4 divisors (see below), whose sum is σ = 8845200. Its totient is φ = 8599360.

The previous prime is 8722237. The next prime is 8722283. The reversal of 8722279 is 9722278.

8722279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9722278 = 2 ⋅4861139.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8722279 is a prime.

It is a Duffinian number.

8722279 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722079) 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, 61354 + ... + 61495.

It is an arithmetic number, because the mean of its divisors is an integer number (2211300).

Almost surely, 2^8722279 is an apocalyptic number.

8722279 is a deficient number, since it is larger than the sum of its proper divisors (122921).

8722279 is a wasteful number, since it uses less digits than its factorization.

8722279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122920.

The product of its digits is 28224, while the sum is 37.

The square root of 8722279 is about 2953.3504702287. The cubic root of 8722279 is about 205.8464230649.

Subtracting 8722279 from its reverse (9722278), we obtain a palindrome (999999).

It can be divided in two parts, 87 and 22279, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 8722279 in words is "eight million, seven hundred twenty-two thousand, two hundred seventy-nine".