42086879 has 2 divisors, whose sum is σ = 42086880. Its totient is φ = 42086878.

The previous prime is 42086873. The next prime is 42086887. The reversal of 42086879 is 97868024.

42086879 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 42086879 - 2¹² = 42082783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42086873) 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, 21043439 + 21043440.

It is an arithmetic number, because the mean of its divisors is an integer number (21043440).

Almost surely, 2^42086879 is an apocalyptic number.

42086879 is a deficient number, since it is larger than the sum of its proper divisors (1).

42086879 is an equidigital number, since it uses as much as digits as its factorization.

42086879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 42086879 is about 6487.4400960625. The cubic root of 42086879 is about 347.8421769715.

The spelling of 42086879 in words is "forty-two million, eighty-six thousand, eight hundred seventy-nine".