42809027 has 2 divisors, whose sum is σ = 42809028. Its totient is φ = 42809026.

The previous prime is 42808991. The next prime is 42809029. The reversal of 42809027 is 72090824.

42809027 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 is a cyclic number.

It is not a de Polignac number, because 42809027 - 2²⁰ = 41760451 is a prime.

It is a super-2 number, since 2×42809027² = 3665225585373458, which contains 22 as substring.

Together with 42809029, 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 = 42808984 and 42809002.

It is not a weakly prime, because it can be changed into another prime (42809029) 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, 21404513 + 21404514.

It is an arithmetic number, because the mean of its divisors is an integer number (21404514).

Almost surely, 2^42809027 is an apocalyptic number.

42809027 is a deficient number, since it is larger than the sum of its proper divisors (1).

42809027 is an equidigital number, since it uses as much as digits as its factorization.

42809027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 42809027 is about 6542.8607657507. The cubic root of 42809027 is about 349.8203894772.

The spelling of 42809027 in words is "forty-two million, eight hundred nine thousand, twenty-seven".