8921317 has 4 divisors (see below), whose sum is σ = 9390880. Its totient is φ = 8451756.

The previous prime is 8921287. The next prime is 8921321. The reversal of 8921317 is 7131298.

8921317 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 8921317 - 2¹⁵ = 8888549 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 (8921377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234753 + ... + 234790.

It is an arithmetic number, because the mean of its divisors is an integer number (2347720).

Almost surely, 2^8921317 is an apocalyptic number.

It is an amenable number.

8921317 is a deficient number, since it is larger than the sum of its proper divisors (469563).

8921317 is a wasteful number, since it uses less digits than its factorization.

8921317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469562.

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

The square root of 8921317 is about 2986.8573785837. The cubic root of 8921317 is about 207.4004322228.

It can be divided in two parts, 892 and 1317, that added together give a square (2209 = 47²).

The spelling of 8921317 in words is "eight million, nine hundred twenty-one thousand, three hundred seventeen".