3993061481 has 2 divisors, whose sum is σ = 3993061482. Its totient is φ = 3993061480.

The previous prime is 3993061469. The next prime is 3993061543. The reversal of 3993061481 is 1841603993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3722952256 + 270109225 = 61016^2 + 16435^2 .

It is a cyclic number.

It is not a de Polignac number, because 3993061481 - 2¹⁴ = 3993045097 is a prime.

It is a super-2 number, since 2×3993061481² = 31889079982091826722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3993061421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996530740 + 1996530741.

It is an arithmetic number, because the mean of its divisors is an integer number (1996530741).

Almost surely, 2^3993061481 is an apocalyptic number.

It is an amenable number.

3993061481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993061481 is an equidigital number, since it uses as much as digits as its factorization.

3993061481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 3993061481 is about 63190.6755858805. The cubic root of 3993061481 is about 1586.4826697156.

The spelling of 3993061481 in words is "three billion, nine hundred ninety-three million, sixty-one thousand, four hundred eighty-one".