8921005 has 8 divisors (see below), whose sum is σ = 11335032. Its totient is φ = 6716928.

The previous prime is 8920999. The next prime is 8921021. The reversal of 8921005 is 5001298.

8921005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 866761 + 8054244 = 931^2 + 2838^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8921005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52392 + ... + 52561.

It is an arithmetic number, because the mean of its divisors is an integer number (1416879).

Almost surely, 2^8921005 is an apocalyptic number.

8921005 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8921005 is a deficient number, since it is larger than the sum of its proper divisors (2414027).

8921005 is a wasteful number, since it uses less digits than its factorization.

8921005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104975.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 8921005 is about 2986.8051493193. The cubic root of 8921005 is about 207.3980144300.

The spelling of 8921005 in words is "eight million, nine hundred twenty-one thousand, five".