42709039 has 2 divisors, whose sum is σ = 42709040. Its totient is φ = 42709038.

The previous prime is 42709033. The next prime is 42709067. The reversal of 42709039 is 93090724.

42709039 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 is a cyclic number.

It is not a de Polignac number, because 42709039 - 2⁹ = 42708527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42708995 and 42709013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42709033) 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, 21354519 + 21354520.

It is an arithmetic number, because the mean of its divisors is an integer number (21354520).

Almost surely, 2^42709039 is an apocalyptic number.

42709039 is a deficient number, since it is larger than the sum of its proper divisors (1).

42709039 is an equidigital number, since it uses as much as digits as its factorization.

42709039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 42709039 is about 6535.2152986723. The cubic root of 42709039 is about 349.5478215069.

The spelling of 42709039 in words is "forty-two million, seven hundred nine thousand, thirty-nine".