34209839 has 2 divisors, whose sum is σ = 34209840. Its totient is φ = 34209838.

The previous prime is 34209817. The next prime is 34209871. The reversal of 34209839 is 93890243.

It is a weak prime.

It is an emirp because it is prime and its reverse (93890243) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34209839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34209239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17104919 + 17104920.

It is an arithmetic number, because the mean of its divisors is an integer number (17104920).

Almost surely, 2^34209839 is an apocalyptic number.

34209839 is a deficient number, since it is larger than the sum of its proper divisors (1).

34209839 is an equidigital number, since it uses as much as digits as its factorization.

34209839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 34209839 is about 5848.9177631422. The cubic root of 34209839 is about 324.6262812723.

The spelling of 34209839 in words is "thirty-four million, two hundred nine thousand, eight hundred thirty-nine".