40020089 has 2 divisors, whose sum is σ = 40020090. Its totient is φ = 40020088.

The previous prime is 40020083. The next prime is 40020103. The reversal of 40020089 is 98002004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39904489 + 115600 = 6317^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 40020089 - 2¹⁶ = 39954553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40020083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010044 + 20010045.

It is an arithmetic number, because the mean of its divisors is an integer number (20010045).

Almost surely, 2^40020089 is an apocalyptic number.

It is an amenable number.

40020089 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020089 is an equidigital number, since it uses as much as digits as its factorization.

40020089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 40020089 is about 6326.1432958794. The cubic root of 40020089 is about 342.0524325981.

The spelling of 40020089 in words is "forty million, twenty thousand, eighty-nine".