40645747 has 2 divisors, whose sum is σ = 40645748. Its totient is φ = 40645746.

The previous prime is 40645729. The next prime is 40645777. The reversal of 40645747 is 74754604.

40645747 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 40645747 - 2²³ = 32257139 is a prime.

It is not a weakly prime, because it can be changed into another prime (40645777) 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, 20322873 + 20322874.

It is an arithmetic number, because the mean of its divisors is an integer number (20322874).

Almost surely, 2^40645747 is an apocalyptic number.

40645747 is a deficient number, since it is larger than the sum of its proper divisors (1).

40645747 is an equidigital number, since it uses as much as digits as its factorization.

40645747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 40645747 is about 6375.4017128335. The cubic root of 40645747 is about 343.8257269197.

The spelling of 40645747 in words is "forty million, six hundred forty-five thousand, seven hundred forty-seven".