40581109 has 2 divisors, whose sum is σ = 40581110. Its totient is φ = 40581108.

The previous prime is 40581097. The next prime is 40581113. The reversal of 40581109 is 90118504.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24780484 + 15800625 = 4978^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 40581109 - 2¹⁷ = 40450037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40581509) 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, 20290554 + 20290555.

It is an arithmetic number, because the mean of its divisors is an integer number (20290555).

Almost surely, 2^40581109 is an apocalyptic number.

It is an amenable number.

40581109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40581109 is an equidigital number, since it uses as much as digits as its factorization.

40581109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 40581109 is about 6370.3303681991. The cubic root of 40581109 is about 343.6433708285.

The spelling of 40581109 in words is "forty million, five hundred eighty-one thousand, one hundred nine".