3847712161 has 2 divisors, whose sum is σ = 3847712162. Its totient is φ = 3847712160.

The previous prime is 3847712149. The next prime is 3847712191. The reversal of 3847712161 is 1612177483.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2474565025 + 1373147136 = 49745^2 + 37056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3847712161 is a prime.

It is not a weakly prime, because it can be changed into another prime (3847712101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1923856080 + 1923856081.

It is an arithmetic number, because the mean of its divisors is an integer number (1923856081).

Almost surely, 2^3847712161 is an apocalyptic number.

It is an amenable number.

3847712161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3847712161 is an equidigital number, since it uses as much as digits as its factorization.

3847712161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 3847712161 is about 62029.9295582383. The cubic root of 3847712161 is about 1566.9946918743.

The spelling of 3847712161 in words is "three billion, eight hundred forty-seven million, seven hundred twelve thousand, one hundred sixty-one".