8917321 has 4 divisors (see below), whose sum is σ = 10191232. Its totient is φ = 7643412.

The previous prime is 8917309. The next prime is 8917339. The reversal of 8917321 is 1237198.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8917321 - 2²¹ = 6820169 is a prime.

It is a super-2 number, since 2×8917321² = 159037227634082, which contains 22 as substring.

It is a Duffinian number.

8917321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8917351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636945 + ... + 636958.

It is an arithmetic number, because the mean of its divisors is an integer number (2547808).

Almost surely, 2^8917321 is an apocalyptic number.

It is an amenable number.

8917321 is a deficient number, since it is larger than the sum of its proper divisors (1273911).

8917321 is a wasteful number, since it uses less digits than its factorization.

8917321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273910.

The product of its digits is 3024, while the sum is 31.

The square root of 8917321 is about 2986.1883731607. The cubic root of 8917321 is about 207.3694616125.

The spelling of 8917321 in words is "eight million, nine hundred seventeen thousand, three hundred twenty-one".