40240004393 has 2 divisors, whose sum is σ = 40240004394. Its totient is φ = 40240004392.

The previous prime is 40240004381. The next prime is 40240004437. The reversal of 40240004393 is 39340004204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29665584169 + 10574420224 = 172237^2 + 102832^2 .

It is a cyclic number.

It is not a de Polignac number, because 40240004393 - 2⁸ = 40240004137 is a prime.

It is not a weakly prime, because it can be changed into another prime (40240004303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20120002196 + 20120002197.

It is an arithmetic number, because the mean of its divisors is an integer number (20120002197).

Almost surely, 2^40240004393 is an apocalyptic number.

It is an amenable number.

40240004393 is a deficient number, since it is larger than the sum of its proper divisors (1).

40240004393 is an equidigital number, since it uses as much as digits as its factorization.

40240004393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 40240004393 its reverse (39340004204), we get a palindrome (79580008597).

The spelling of 40240004393 in words is "forty billion, two hundred forty million, four thousand, three hundred ninety-three".