8772217 has 4 divisors (see below), whose sum is σ = 8810100. Its totient is φ = 8734336.

The previous prime is 8772209. The next prime is 8772229. The reversal of 8772217 is 7122778.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5517801 + 3254416 = 2349^2 + 1804^2 .

It is a cyclic number.

It is not a de Polignac number, because 8772217 - 2³ = 8772209 is a prime.

It is a Duffinian number.

8772217 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8772317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18592 + ... + 19057.

It is an arithmetic number, because the mean of its divisors is an integer number (2202525).

Almost surely, 2^8772217 is an apocalyptic number.

It is an amenable number.

8772217 is a deficient number, since it is larger than the sum of its proper divisors (37883).

8772217 is a wasteful number, since it uses less digits than its factorization.

8772217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37882.

The product of its digits is 10976, while the sum is 34.

The square root of 8772217 is about 2961.7928691926. The cubic root of 8772217 is about 206.2385225324.

The spelling of 8772217 in words is "eight million, seven hundred seventy-two thousand, two hundred seventeen".