3847251908869 has 2 divisors, whose sum is σ = 3847251908870. Its totient is φ = 3847251908868.

The previous prime is 3847251908723. The next prime is 3847251908909. The reversal of 3847251908869 is 9688091527483.

3847251908869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3809640348900 + 37611559969 = 1951830^2 + 193937^2 .

It is a cyclic number.

It is not a de Polignac number, because 3847251908869 - 2¹⁵ = 3847251876101 is a prime.

It is a super-2 number, since 2×3847251908869² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3847251908798 and 3847251908807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3847251908569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1923625954434 + 1923625954435.

It is an arithmetic number, because the mean of its divisors is an integer number (1923625954435).

It is a 1-persistent number, because it is pandigital, but 2⋅3847251908869 = 7694503817738 is not.

Almost surely, 2^{3847251908869} is an apocalyptic number.

It is an amenable number.

3847251908869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3847251908869 is an equidigital number, since it uses as much as digits as its factorization.

3847251908869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209018880, while the sum is 70.

The spelling of 3847251908869 in words is "three trillion, eight hundred forty-seven billion, two hundred fifty-one million, nine hundred eight thousand, eight hundred sixty-nine".