3963128891 has 2 divisors, whose sum is σ = 3963128892. Its totient is φ = 3963128890.

The previous prime is 3963128861. The next prime is 3963128933. The reversal of 3963128891 is 1988213693.

3963128891 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3963128891 - 2¹⁴ = 3963112507 is a prime.

It is not a weakly prime, because it can be changed into another prime (3963128801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1981564445 + 1981564446.

It is an arithmetic number, because the mean of its divisors is an integer number (1981564446).

Almost surely, 2^3963128891 is an apocalyptic number.

3963128891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3963128891 is an equidigital number, since it uses as much as digits as its factorization.

3963128891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 3963128891 is about 62953.3866523478. The cubic root of 3963128891 is about 1582.5085519397.

The spelling of 3963128891 in words is "three billion, nine hundred sixty-three million, one hundred twenty-eight thousand, eight hundred ninety-one".