3439539221 has 2 divisors, whose sum is σ = 3439539222. Its totient is φ = 3439539220.

The previous prime is 3439539217. The next prime is 3439539223. The reversal of 3439539221 is 1229359343.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3420963121 + 18576100 = 58489^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 3439539221 - 2² = 3439539217 is a prime.

Together with 3439539223, 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 (3439539223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1719769610 + 1719769611.

It is an arithmetic number, because the mean of its divisors is an integer number (1719769611).

Almost surely, 2^3439539221 is an apocalyptic number.

It is an amenable number.

3439539221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3439539221 is an equidigital number, since it uses as much as digits as its factorization.

3439539221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 41.

The square root of 3439539221 is about 58647.5849545401. The cubic root of 3439539221 is about 1509.5010589325.

The spelling of 3439539221 in words is "three billion, four hundred thirty-nine million, five hundred thirty-nine thousand, two hundred twenty-one".