42067609 has 2 divisors, whose sum is σ = 42067610. Its totient is φ = 42067608.

The previous prime is 42067591. The next prime is 42067643. The reversal of 42067609 is 90676024.

It is an a-pointer prime, because the next prime (42067643) can be obtained adding 42067609 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36905625 + 5161984 = 6075^2 + 2272^2 .

It is a cyclic number.

It is not a de Polignac number, because 42067609 - 2⁷ = 42067481 is a prime.

It is a super-3 number, since 3×42067609³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42067699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21033804 + 21033805.

It is an arithmetic number, because the mean of its divisors is an integer number (21033805).

Almost surely, 2^42067609 is an apocalyptic number.

It is an amenable number.

42067609 is a deficient number, since it is larger than the sum of its proper divisors (1).

42067609 is an equidigital number, since it uses as much as digits as its factorization.

42067609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 42067609 is about 6485.9547485316. The cubic root of 42067609 is about 347.7890809142.

The spelling of 42067609 in words is "forty-two million, sixty-seven thousand, six hundred nine".