8722447 has 2 divisors, whose sum is σ = 8722448. Its totient is φ = 8722446.

The previous prime is 8722429. The next prime is 8722459. The reversal of 8722447 is 7442278.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8722447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8722477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4361223 + 4361224.

It is an arithmetic number, because the mean of its divisors is an integer number (4361224).

Almost surely, 2^8722447 is an apocalyptic number.

8722447 is a deficient number, since it is larger than the sum of its proper divisors (1).

8722447 is an equidigital number, since it uses as much as digits as its factorization.

8722447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 34.

The square root of 8722447 is about 2953.3789123646. The cubic root of 8722447 is about 205.8477446606.

The spelling of 8722447 in words is "eight million, seven hundred twenty-two thousand, four hundred forty-seven".