8722247 has 4 divisors (see below), whose sum is σ = 8731296. Its totient is φ = 8713200.

The previous prime is 8722237. The next prime is 8722283. The reversal of 8722247 is 7422278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7422278 = 2 ⋅3711139.

It is a cyclic number.

It is not a de Polignac number, because 8722247 - 2¹⁸ = 8460103 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2879 + ... + 5072.

It is an arithmetic number, because the mean of its divisors is an integer number (2182824).

Almost surely, 2^8722247 is an apocalyptic number.

8722247 is a deficient number, since it is larger than the sum of its proper divisors (9049).

8722247 is a wasteful number, since it uses less digits than its factorization.

8722247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9048.

The product of its digits is 12544, while the sum is 32.

The square root of 8722247 is about 2953.3450526479. The cubic root of 8722247 is about 205.8461713305.

The spelling of 8722247 in words is "eight million, seven hundred twenty-two thousand, two hundred forty-seven".