40646747 has 2 divisors, whose sum is σ = 40646748. Its totient is φ = 40646746.

The previous prime is 40646741. The next prime is 40646759. The reversal of 40646747 is 74764604.

40646747 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 is a cyclic number.

It is not a de Polignac number, because 40646747 - 2¹⁰ = 40645723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40646747.

It is not a weakly prime, because it can be changed into another prime (40646741) 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, 20323373 + 20323374.

It is an arithmetic number, because the mean of its divisors is an integer number (20323374).

Almost surely, 2^40646747 is an apocalyptic number.

40646747 is a deficient number, since it is larger than the sum of its proper divisors (1).

40646747 is an equidigital number, since it uses as much as digits as its factorization.

40646747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 38.

The square root of 40646747 is about 6375.4801387817. The cubic root of 40646747 is about 343.8285465907.

The spelling of 40646747 in words is "forty million, six hundred forty-six thousand, seven hundred forty-seven".