3856391339 has 4 divisors (see below), whose sum is σ = 3857212920. Its totient is φ = 3855569760.

The previous prime is 3856391327. The next prime is 3856391369. The reversal of 3856391339 is 9331936583.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3856391339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3856391309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403709 + ... + 413150.

It is an arithmetic number, because the mean of its divisors is an integer number (964303230).

Almost surely, 2^3856391339 is an apocalyptic number.

3856391339 is a deficient number, since it is larger than the sum of its proper divisors (821581).

3856391339 is an equidigital number, since it uses as much as digits as its factorization.

3856391339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821580.

The product of its digits is 1574640, while the sum is 50.

The square root of 3856391339 is about 62099.8497502208. The cubic root of 3856391339 is about 1568.1720159740.

The spelling of 3856391339 in words is "three billion, eight hundred fifty-six million, three hundred ninety-one thousand, three hundred thirty-nine".