42808937 has 2 divisors, whose sum is σ = 42808938. Its totient is φ = 42808936.

The previous prime is 42808897. The next prime is 42808939. The reversal of 42808937 is 73980824.

42808937 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 can be written as a sum of positive squares in only one way, i.e., 32024281 + 10784656 = 5659^2 + 3284^2 .

It is a cyclic number.

It is not a de Polignac number, because 42808937 - 2¹⁰ = 42807913 is a prime.

Together with 42808939, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42808894 and 42808903.

It is not a weakly prime, because it can be changed into another prime (42808939) 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, 21404468 + 21404469.

It is an arithmetic number, because the mean of its divisors is an integer number (21404469).

Almost surely, 2^42808937 is an apocalyptic number.

It is an amenable number.

42808937 is a deficient number, since it is larger than the sum of its proper divisors (1).

42808937 is an equidigital number, since it uses as much as digits as its factorization.

42808937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 42808937 is about 6542.8538880216. The cubic root of 42808937 is about 349.8201443275.

The spelling of 42808937 in words is "forty-two million, eight hundred eight thousand, nine hundred thirty-seven".