3991422241993 has 2 divisors, whose sum is σ = 3991422241994. Its totient is φ = 3991422241992.

The previous prime is 3991422241981. The next prime is 3991422242051.

3991422241993 is nontrivially palindromic in base 10.

It is an a-pointer prime, because the next prime (3991422242051) can be obtained adding 3991422241993 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3159975527424 + 831446714569 = 1777632^2 + 911837^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 3991422241993 - 2⁹ = 3991422241481 is a prime.

It is a super-2 number, since 2×3991422241993² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3991422241943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995711120996 + 1995711120997.

It is an arithmetic number, because the mean of its divisors is an integer number (1995711120997).

Almost surely, 2^{3991422241993} is an apocalyptic number.

It is an amenable number.

3991422241993 is a deficient number, since it is larger than the sum of its proper divisors (1).

3991422241993 is an equidigital number, since it uses as much as digits as its factorization.

3991422241993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7558272, while the sum is 58.

The spelling of 3991422241993 in words is "three trillion, nine hundred ninety-one billion, four hundred twenty-two million, two hundred forty-one thousand, nine hundred ninety-three".