8912021 has 2 divisors, whose sum is σ = 8912022. Its totient is φ = 8912020.

The previous prime is 8912011. The next prime is 8912023. The reversal of 8912021 is 1202198.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7349521 + 1562500 = 2711^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 8912021 - 2²² = 4717717 is a prime.

It is a Sophie Germain prime.

Together with 8912023, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8912023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4456010 + 4456011.

It is an arithmetic number, because the mean of its divisors is an integer number (4456011).

Almost surely, 2^8912021 is an apocalyptic number.

It is an amenable number.

8912021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8912021 is an equidigital number, since it uses as much as digits as its factorization.

8912021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 8912021 is about 2985.3008223628. The cubic root of 8912021 is about 207.3283701995.

The spelling of 8912021 in words is "eight million, nine hundred twelve thousand, twenty-one".