40389109 has 2 divisors, whose sum is σ = 40389110. Its totient is φ = 40389108.

The previous prime is 40389103. The next prime is 40389119. The reversal of 40389109 is 90198304.

40389109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36300625 + 4088484 = 6025^2 + 2022^2 .

It is a cyclic number.

It is not a de Polignac number, because 40389109 - 2³ = 40389101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40389101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20194554 + 20194555.

It is an arithmetic number, because the mean of its divisors is an integer number (20194555).

Almost surely, 2^40389109 is an apocalyptic number.

It is an amenable number.

40389109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40389109 is an equidigital number, since it uses as much as digits as its factorization.

40389109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 40389109 is about 6355.2426389557. The cubic root of 40389109 is about 343.1005578567.

The spelling of 40389109 in words is "forty million, three hundred eighty-nine thousand, one hundred nine".