8893921 has 2 divisors, whose sum is σ = 8893922. Its totient is φ = 8893920.

The previous prime is 8893901. The next prime is 8893943. The reversal of 8893921 is 1293988.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8346321 + 547600 = 2889^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 8893921 - 2⁵ = 8893889 is a prime.

8893921 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8893901) 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 as a sum of consecutive naturals, namely, 4446960 + 4446961.

It is an arithmetic number, because the mean of its divisors is an integer number (4446961).

Almost surely, 2^8893921 is an apocalyptic number.

It is an amenable number.

8893921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8893921 is an equidigital number, since it uses as much as digits as its factorization.

8893921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 8893921 is about 2982.2677612850. The cubic root of 8893921 is about 207.1879162042.

The spelling of 8893921 in words is "eight million, eight hundred ninety-three thousand, nine hundred twenty-one".