40665593 has 2 divisors, whose sum is σ = 40665594. Its totient is φ = 40665592.

The previous prime is 40665571. The next prime is 40665607. The reversal of 40665593 is 39556604.

40665593 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 can be written as a sum of positive squares in only one way, i.e., 29463184 + 11202409 = 5428^2 + 3347^2 .

It is a cyclic number.

It is not a de Polignac number, because 40665593 - 2¹⁴ = 40649209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40665523) 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, 20332796 + 20332797.

It is an arithmetic number, because the mean of its divisors is an integer number (20332797).

Almost surely, 2^40665593 is an apocalyptic number.

It is an amenable number.

40665593 is a deficient number, since it is larger than the sum of its proper divisors (1).

40665593 is an equidigital number, since it uses as much as digits as its factorization.

40665593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 40665593 is about 6376.9579738305. The cubic root of 40665593 is about 343.8816774648.

The spelling of 40665593 in words is "forty million, six hundred sixty-five thousand, five hundred ninety-three".