42868393 has 2 divisors, whose sum is σ = 42868394. Its totient is φ = 42868392.

The previous prime is 42868387. The next prime is 42868403. The reversal of 42868393 is 39386824.

42868393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42863209 + 5184 = 6547^2 + 72^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42868393 is a prime.

It is not a weakly prime, because it can be changed into another prime (42868303) 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, 21434196 + 21434197.

It is an arithmetic number, because the mean of its divisors is an integer number (21434197).

Almost surely, 2^42868393 is an apocalyptic number.

It is an amenable number.

42868393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42868393 is an equidigital number, since it uses as much as digits as its factorization.

42868393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 43.

The square root of 42868393 is about 6547.3958945523. The cubic root of 42868393 is about 349.9820208452.

The spelling of 42868393 in words is "forty-two million, eight hundred sixty-eight thousand, three hundred ninety-three".