34221809 has 2 divisors, whose sum is σ = 34221810. Its totient is φ = 34221808.

The previous prime is 34221779. The next prime is 34221857. The reversal of 34221809 is 90812243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17247409 + 16974400 = 4153^2 + 4120^2 .

It is a cyclic number.

It is not a de Polignac number, because 34221809 - 2⁸ = 34221553 is a prime.

It is a super-2 number, since 2×34221809² = 2342264422464962, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (34221899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17110904 + 17110905.

It is an arithmetic number, because the mean of its divisors is an integer number (17110905).

Almost surely, 2^34221809 is an apocalyptic number.

It is an amenable number.

34221809 is a deficient number, since it is larger than the sum of its proper divisors (1).

34221809 is an equidigital number, since it uses as much as digits as its factorization.

34221809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 34221809 is about 5849.9409398728. The cubic root of 34221809 is about 324.6641390307.

The spelling of 34221809 in words is "thirty-four million, two hundred twenty-one thousand, eight hundred nine".