42868387 has 2 divisors, whose sum is σ = 42868388. Its totient is φ = 42868386.

The previous prime is 42868349. The next prime is 42868393. The reversal of 42868387 is 78386824.

42868387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42868387 - 2¹⁵ = 42835619 is a prime.

It is not a weakly prime, because it can be changed into another prime (42868307) 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, 21434193 + 21434194.

It is an arithmetic number, because the mean of its divisors is an integer number (21434194).

Almost surely, 2^42868387 is an apocalyptic number.

42868387 is a deficient number, since it is larger than the sum of its proper divisors (1).

42868387 is an equidigital number, since it uses as much as digits as its factorization.

42868387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 46.

The square root of 42868387 is about 6547.3954363548. The cubic root of 42868387 is about 349.9820045169.

The spelling of 42868387 in words is "forty-two million, eight hundred sixty-eight thousand, three hundred eighty-seven".