42878873 has 2 divisors, whose sum is σ = 42878874. Its totient is φ = 42878872.

The previous prime is 42878863. The next prime is 42878887. The reversal of 42878873 is 37887824.

It is a happy number.

42878873 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., 41822089 + 1056784 = 6467^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878873 - 2¹⁸ = 42616729 is a prime.

It is not a weakly prime, because it can be changed into another prime (42878833) 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, 21439436 + 21439437.

It is an arithmetic number, because the mean of its divisors is an integer number (21439437).

Almost surely, 2^42878873 is an apocalyptic number.

It is an amenable number.

42878873 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878873 is an equidigital number, since it uses as much as digits as its factorization.

42878873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 602112, while the sum is 47.

The square root of 42878873 is about 6548.1961638302. The cubic root of 42878873 is about 350.0105384582.

The spelling of 42878873 in words is "forty-two million, eight hundred seventy-eight thousand, eight hundred seventy-three".