8069921 has 2 divisors, whose sum is σ = 8069922. Its totient is φ = 8069920.

The previous prime is 8069911. The next prime is 8069953. The reversal of 8069921 is 1299608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8059921 + 10000 = 2839^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 8069921 - 2¹⁴ = 8053537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8069911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4034960 + 4034961.

It is an arithmetic number, because the mean of its divisors is an integer number (4034961).

Almost surely, 2^8069921 is an apocalyptic number.

It is an amenable number.

8069921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8069921 is an equidigital number, since it uses as much as digits as its factorization.

8069921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 8069921 is about 2840.7606375758. The cubic root of 8069921 is about 200.5809856442.

The spelling of 8069921 in words is "eight million, sixty-nine thousand, nine hundred twenty-one".