42975089 has 2 divisors, whose sum is σ = 42975090. Its totient is φ = 42975088.

The previous prime is 42975077. The next prime is 42975157. The reversal of 42975089 is 98057924.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31550689 + 11424400 = 5617^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 42975089 - 2¹⁶ = 42909553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42975029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21487544 + 21487545.

It is an arithmetic number, because the mean of its divisors is an integer number (21487545).

Almost surely, 2^42975089 is an apocalyptic number.

It is an amenable number.

42975089 is a deficient number, since it is larger than the sum of its proper divisors (1).

42975089 is an equidigital number, since it uses as much as digits as its factorization.

42975089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 42975089 is about 6555.5388031801. The cubic root of 42975089 is about 350.2721393660.

The spelling of 42975089 in words is "forty-two million, nine hundred seventy-five thousand, eighty-nine".