8289921 has 8 divisors (see below), whose sum is σ = 11090464. Its totient is φ = 5508000.

The previous prime is 8289917. The next prime is 8289949. The reversal of 8289921 is 1299828.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8289921 - 2² = 8289917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8289921.

It is not an unprimeable number, because it can be changed into a prime (8289901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3580 + ... + 5421.

It is an arithmetic number, because the mean of its divisors is an integer number (1386308).

Almost surely, 2^8289921 is an apocalyptic number.

It is an amenable number.

8289921 is a deficient number, since it is larger than the sum of its proper divisors (2800543).

8289921 is a wasteful number, since it uses less digits than its factorization.

8289921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9311.

The product of its digits is 20736, while the sum is 39.

The square root of 8289921 is about 2879.2222908279. Note that the first 4 decimals coincide. The cubic root of 8289921 is about 202.3873966255.

It can be divided in two parts, 8289 and 921, that multiplied together give a square (7634169 = 2763²).

The spelling of 8289921 in words is "eight million, two hundred eighty-nine thousand, nine hundred twenty-one".