943993481 has 2 divisors, whose sum is σ = 943993482. Its totient is φ = 943993480.

The previous prime is 943993433. The next prime is 943993487. The reversal of 943993481 is 184399349.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 755755081 + 188238400 = 27491^2 + 13720^2 .

It is a cyclic number.

It is not a de Polignac number, because 943993481 - 2¹⁸ = 943731337 is a prime.

It is a super-2 number, since 2×943993481² = 1782247384340994722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (943993487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 471996740 + 471996741.

It is an arithmetic number, because the mean of its divisors is an integer number (471996741).

Almost surely, 2^943993481 is an apocalyptic number.

It is an amenable number.

943993481 is a deficient number, since it is larger than the sum of its proper divisors (1).

943993481 is an equidigital number, since it uses as much as digits as its factorization.

943993481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 50.

The square root of 943993481 is about 30724.4769036024. The cubic root of 943993481 is about 980.9713681898.

It can be divided in two parts, 94399348 and 1, that added together give a palindrome (94399349).

The spelling of 943993481 in words is "nine hundred forty-three million, nine hundred ninety-three thousand, four hundred eighty-one".