40403947 has 2 divisors, whose sum is σ = 40403948. Its totient is φ = 40403946.

The previous prime is 40403933. The next prime is 40403969. The reversal of 40403947 is 74930404.

40403947 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 40403947 - 2¹⁵ = 40371179 is a prime.

It is not a weakly prime, because it can be changed into another prime (40403927) 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, 20201973 + 20201974.

It is an arithmetic number, because the mean of its divisors is an integer number (20201974).

Almost surely, 2^40403947 is an apocalyptic number.

40403947 is a deficient number, since it is larger than the sum of its proper divisors (1).

40403947 is an equidigital number, since it uses as much as digits as its factorization.

40403947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 40403947 is about 6356.4099144092. The cubic root of 40403947 is about 343.1425683797.

The spelling of 40403947 in words is "forty million, four hundred three thousand, nine hundred forty-seven".