3881731361 has 2 divisors, whose sum is σ = 3881731362. Its totient is φ = 3881731360.

The previous prime is 3881731291. The next prime is 3881731421. The reversal of 3881731361 is 1631371883.

3881731361 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., 3651905761 + 229825600 = 60431^2 + 15160^2 .

It is a cyclic number.

It is not a de Polignac number, because 3881731361 - 2¹⁰ = 3881730337 is a prime.

It is not a weakly prime, because it can be changed into another prime (3881730361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1940865680 + 1940865681.

It is an arithmetic number, because the mean of its divisors is an integer number (1940865681).

Almost surely, 2^3881731361 is an apocalyptic number.

It is an amenable number.

3881731361 is a deficient number, since it is larger than the sum of its proper divisors (1).

3881731361 is an equidigital number, since it uses as much as digits as its factorization.

3881731361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 3881731361 is about 62303.5421224187. The cubic root of 3881731361 is about 1571.5992954314.

The spelling of 3881731361 in words is "three billion, eight hundred eighty-one million, seven hundred thirty-one thousand, three hundred sixty-one".