4001440393 has 2 divisors, whose sum is σ = 4001440394. Its totient is φ = 4001440392.

The previous prime is 4001440301. The next prime is 4001440409. The reversal of 4001440393 is 3930441004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3944844864 + 56595529 = 62808^2 + 7523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4001440393 is a prime.

It is not a weakly prime, because it can be changed into another prime (4001440493) 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, 2000720196 + 2000720197.

It is an arithmetic number, because the mean of its divisors is an integer number (2000720197).

Almost surely, 2^4001440393 is an apocalyptic number.

It is an amenable number.

4001440393 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001440393 is an equidigital number, since it uses as much as digits as its factorization.

4001440393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 4001440393 is about 63256.9394849292. The cubic root of 4001440393 is about 1587.5915692153.

Adding to 4001440393 its reverse (3930441004), we get a palindrome (7931881397).

The spelling of 4001440393 in words is "four billion, one million, four hundred forty thousand, three hundred ninety-three".