34340021 has 2 divisors, whose sum is σ = 34340022. Its totient is φ = 34340020.

The previous prime is 34339997. The next prime is 34340023. The reversal of 34340021 is 12004343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23522500 + 10817521 = 4850^2 + 3289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34340021 is a prime.

Together with 34340023, 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 (34340023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17170010 + 17170011.

It is an arithmetic number, because the mean of its divisors is an integer number (17170011).

Almost surely, 2^34340021 is an apocalyptic number.

It is an amenable number.

34340021 is a deficient number, since it is larger than the sum of its proper divisors (1).

34340021 is an equidigital number, since it uses as much as digits as its factorization.

34340021 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 34340021 is about 5860.0359213916. The cubic root of 34340021 is about 325.0375372817.

Adding to 34340021 its reverse (12004343), we get a palindrome (46344364).

The spelling of 34340021 in words is "thirty-four million, three hundred forty thousand, twenty-one".