3920839613 has 4 divisors (see below), whose sum is σ = 3928087548. Its totient is φ = 3913591680.

The previous prime is 3920839609. The next prime is 3920839667. The reversal of 3920839613 is 3169380293.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3169915204 + 750924409 = 56302^2 + 27403^2 .

It is a cyclic number.

It is not a de Polignac number, because 3920839613 - 2² = 3920839609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920839673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3623156 + ... + 3624237.

It is an arithmetic number, because the mean of its divisors is an integer number (982021887).

Almost surely, 2^3920839613 is an apocalyptic number.

It is an amenable number.

3920839613 is a deficient number, since it is larger than the sum of its proper divisors (7247935).

3920839613 is an equidigital number, since it uses as much as digits as its factorization.

3920839613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7247934.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 3920839613 is about 62616.6081243627. The cubic root of 3920839613 is about 1576.8595974850.

The spelling of 3920839613 in words is "three billion, nine hundred twenty million, eight hundred thirty-nine thousand, six hundred thirteen".