34430021 has 2 divisors, whose sum is σ = 34430022. Its totient is φ = 34430020.

The previous prime is 34430009. The next prime is 34430023. The reversal of 34430021 is 12003443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34281025 + 148996 = 5855^2 + 386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34430021 is a prime.

Together with 34430023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34430023) 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, 17215010 + 17215011.

It is an arithmetic number, because the mean of its divisors is an integer number (17215011).

Almost surely, 2^34430021 is an apocalyptic number.

It is an amenable number.

34430021 is a deficient number, since it is larger than the sum of its proper divisors (1).

34430021 is an equidigital number, since it uses as much as digits as its factorization.

34430021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 34430021 is about 5867.7100303270. The cubic root of 34430021 is about 325.3212476428.

Adding to 34430021 its reverse (12003443), we get a palindrome (46433464).

The spelling of 34430021 in words is "thirty-four million, four hundred thirty thousand, twenty-one".