40043747 has 2 divisors, whose sum is σ = 40043748. Its totient is φ = 40043746.

The previous prime is 40043741. The next prime is 40043767. The reversal of 40043747 is 74734004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40043747 - 2¹² = 40039651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40043741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021873 + 20021874.

It is an arithmetic number, because the mean of its divisors is an integer number (20021874).

Almost surely, 2^40043747 is an apocalyptic number.

40043747 is a deficient number, since it is larger than the sum of its proper divisors (1).

40043747 is an equidigital number, since it uses as much as digits as its factorization.

40043747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 40043747 is about 6328.0128792536. The cubic root of 40043747 is about 342.1198211071.

The spelling of 40043747 in words is "forty million, forty-three thousand, seven hundred forty-seven".