40747909 has 2 divisors, whose sum is σ = 40747910. Its totient is φ = 40747908.

The previous prime is 40747907. The next prime is 40747921. The reversal of 40747909 is 90974704.

40747909 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., 39727809 + 1020100 = 6303^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 40747909 - 2¹ = 40747907 is a prime.

Together with 40747907, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40747907) 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, 20373954 + 20373955.

It is an arithmetic number, because the mean of its divisors is an integer number (20373955).

Almost surely, 2^40747909 is an apocalyptic number.

It is an amenable number.

40747909 is a deficient number, since it is larger than the sum of its proper divisors (1).

40747909 is an equidigital number, since it uses as much as digits as its factorization.

40747909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 40747909 is about 6383.4088855407. The cubic root of 40747909 is about 344.1135515030.

The spelling of 40747909 in words is "forty million, seven hundred forty-seven thousand, nine hundred nine".