40559689 has 2 divisors, whose sum is σ = 40559690. Its totient is φ = 40559688.

The previous prime is 40559683. The next prime is 40559711. The reversal of 40559689 is 98695504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33177600 + 7382089 = 5760^2 + 2717^2 .

It is a cyclic number.

It is not a de Polignac number, because 40559689 - 2⁹ = 40559177 is a prime.

It is not a weakly prime, because it can be changed into another prime (40559683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20279844 + 20279845.

It is an arithmetic number, because the mean of its divisors is an integer number (20279845).

Almost surely, 2^40559689 is an apocalyptic number.

It is an amenable number.

40559689 is a deficient number, since it is larger than the sum of its proper divisors (1).

40559689 is an equidigital number, since it uses as much as digits as its factorization.

40559689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 40559689 is about 6368.6489148013. The cubic root of 40559689 is about 343.5828982206.

The spelling of 40559689 in words is "forty million, five hundred fifty-nine thousand, six hundred eighty-nine".