40938647 has 2 divisors, whose sum is σ = 40938648. Its totient is φ = 40938646.

The previous prime is 40938607. The next prime is 40938683. The reversal of 40938647 is 74683904.

40938647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40938647 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 (40938607) 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, 20469323 + 20469324.

It is an arithmetic number, because the mean of its divisors is an integer number (20469324).

Almost surely, 2^40938647 is an apocalyptic number.

40938647 is a deficient number, since it is larger than the sum of its proper divisors (1).

40938647 is an equidigital number, since it uses as much as digits as its factorization.

40938647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 40938647 is about 6398.3315794041. The cubic root of 40938647 is about 344.6496394151.

The spelling of 40938647 in words is "forty million, nine hundred thirty-eight thousand, six hundred forty-seven".