3920839609 has 2 divisors, whose sum is σ = 3920839610. Its totient is φ = 3920839608.

The previous prime is 3920839597. The next prime is 3920839667. The reversal of 3920839609 is 9069380293.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3884779584 + 36060025 = 62328^2 + 6005^2 .

It is a cyclic number.

It is not a de Polignac number, because 3920839609 - 2⁵ = 3920839577 is a prime.

It is not a weakly prime, because it can be changed into another prime (3920839409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960419804 + 1960419805.

It is an arithmetic number, because the mean of its divisors is an integer number (1960419805).

Almost surely, 2^3920839609 is an apocalyptic number.

It is an amenable number.

3920839609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3920839609 is an equidigital number, since it uses as much as digits as its factorization.

3920839609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 3920839609 is about 62616.6080924223. The cubic root of 3920839609 is about 1576.8595969488.

The spelling of 3920839609 in words is "three billion, nine hundred twenty million, eight hundred thirty-nine thousand, six hundred nine".