42659839 has 2 divisors, whose sum is σ = 42659840. Its totient is φ = 42659838.

The previous prime is 42659831. The next prime is 42659849. The reversal of 42659839 is 93895624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42659839 - 2³ = 42659831 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42659831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21329919 + 21329920.

It is an arithmetic number, because the mean of its divisors is an integer number (21329920).

Almost surely, 2^42659839 is an apocalyptic number.

42659839 is a deficient number, since it is larger than the sum of its proper divisors (1).

42659839 is an equidigital number, since it uses as much as digits as its factorization.

42659839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 46.

The square root of 42659839 is about 6531.4499921534. The cubic root of 42659839 is about 349.4135457870.

The spelling of 42659839 in words is "forty-two million, six hundred fifty-nine thousand, eight hundred thirty-nine".