3420865109 has 2 divisors, whose sum is σ = 3420865110. Its totient is φ = 3420865108.

The previous prime is 3420865087. The next prime is 3420865111. The reversal of 3420865109 is 9015680243.

It is a happy number.

3420865109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3395392900 + 25472209 = 58270^2 + 5047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3420865109 is a prime.

Together with 3420865111, 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 (3420865139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710432554 + 1710432555.

It is an arithmetic number, because the mean of its divisors is an integer number (1710432555).

Almost surely, 2^3420865109 is an apocalyptic number.

It is an amenable number.

3420865109 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420865109 is an equidigital number, since it uses as much as digits as its factorization.

3420865109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 3420865109 is about 58488.1621270493. The cubic root of 3420865109 is about 1506.7642814417.

The spelling of 3420865109 in words is "three billion, four hundred twenty million, eight hundred sixty-five thousand, one hundred nine".