3857091109 has 2 divisors, whose sum is σ = 3857091110. Its totient is φ = 3857091108.

The previous prime is 3857091107. The next prime is 3857091131. The reversal of 3857091109 is 9011907583.

3857091109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3540607009 + 316484100 = 59503^2 + 17790^2 .

It is a cyclic number.

It is not a de Polignac number, because 3857091109 - 2¹ = 3857091107 is a prime.

Together with 3857091107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3857091101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928545554 + 1928545555.

It is an arithmetic number, because the mean of its divisors is an integer number (1928545555).

Almost surely, 2^3857091109 is an apocalyptic number.

It is an amenable number.

3857091109 is a deficient number, since it is larger than the sum of its proper divisors (1).

3857091109 is an equidigital number, since it uses as much as digits as its factorization.

3857091109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 3857091109 is about 62105.4837272845. The cubic root of 3857091109 is about 1568.2668622752.

The spelling of 3857091109 in words is "three billion, eight hundred fifty-seven million, ninety-one thousand, one hundred nine".