3859378849 has 2 divisors, whose sum is σ = 3859378850. Its totient is φ = 3859378848.

The previous prime is 3859378847. The next prime is 3859378889. The reversal of 3859378849 is 9488739583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2719101025 + 1140277824 = 52145^2 + 33768^2 .

It is an emirp because it is prime and its reverse (9488739583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3859378849 - 2¹ = 3859378847 is a prime.

Together with 3859378847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3859378847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1929689424 + 1929689425.

It is an arithmetic number, because the mean of its divisors is an integer number (1929689425).

Almost surely, 2^3859378849 is an apocalyptic number.

It is an amenable number.

3859378849 is a deficient number, since it is larger than the sum of its proper divisors (1).

3859378849 is an equidigital number, since it uses as much as digits as its factorization.

3859378849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 64.

The square root of 3859378849 is about 62123.8991773697. The cubic root of 3859378849 is about 1568.5768608058.

The spelling of 3859378849 in words is "three billion, eight hundred fifty-nine million, three hundred seventy-eight thousand, eight hundred forty-nine".