3163744721 has 2 divisors, whose sum is σ = 3163744722. Its totient is φ = 3163744720.

The previous prime is 3163744657. The next prime is 3163744723. The reversal of 3163744721 is 1274473613.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2844622225 + 319122496 = 53335^2 + 17864^2 .

It is a cyclic number.

It is not a de Polignac number, because 3163744721 - 2⁶ = 3163744657 is a prime.

Together with 3163744723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3163744723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1581872360 + 1581872361.

It is an arithmetic number, because the mean of its divisors is an integer number (1581872361).

Almost surely, 2^3163744721 is an apocalyptic number.

It is an amenable number.

3163744721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3163744721 is an equidigital number, since it uses as much as digits as its factorization.

3163744721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 38.

The square root of 3163744721 is about 56247.1752268503. The cubic root of 3163744721 is about 1468.0262156358.

The spelling of 3163744721 in words is "three billion, one hundred sixty-three million, seven hundred forty-four thousand, seven hundred twenty-one".