42606089 has 2 divisors, whose sum is σ = 42606090. Its totient is φ = 42606088.

The previous prime is 42606061. The next prime is 42606119. The reversal of 42606089 is 98060624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40960000 + 1646089 = 6400^2 + 1283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42606089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42606019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21303044 + 21303045.

It is an arithmetic number, because the mean of its divisors is an integer number (21303045).

Almost surely, 2^42606089 is an apocalyptic number.

It is an amenable number.

42606089 is a deficient number, since it is larger than the sum of its proper divisors (1).

42606089 is an equidigital number, since it uses as much as digits as its factorization.

42606089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 42606089 is about 6527.3339886971. Note that the first 3 decimals coincide. The cubic root of 42606089 is about 349.2667342358.

The spelling of 42606089 in words is "forty-two million, six hundred six thousand, eighty-nine".