8820247 has 4 divisors (see below), whose sum is σ = 9203760. Its totient is φ = 8436736.

The previous prime is 8820223. The next prime is 8820257. The reversal of 8820247 is 7420288.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8820247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8820257) 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, 191722 + ... + 191767.

It is an arithmetic number, because the mean of its divisors is an integer number (2300940).

Almost surely, 2^8820247 is an apocalyptic number.

8820247 is a deficient number, since it is larger than the sum of its proper divisors (383513).

8820247 is a wasteful number, since it uses less digits than its factorization.

8820247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383512.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 8820247 is about 2969.8900653054. The cubic root of 8820247 is about 206.6142395052.

The spelling of 8820247 in words is "eight million, eight hundred twenty thousand, two hundred forty-seven".