40217993 has 2 divisors, whose sum is σ = 40217994. Its totient is φ = 40217992.

The previous prime is 40217987. The next prime is 40218011. The reversal of 40217993 is 39971204.

40217993 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 can be written as a sum of positive squares in only one way, i.e., 35904064 + 4313929 = 5992^2 + 2077^2 .

It is a cyclic number.

It is not a de Polignac number, because 40217993 - 2⁶ = 40217929 is a prime.

It is not a weakly prime, because it can be changed into another prime (40217923) 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, 20108996 + 20108997.

It is an arithmetic number, because the mean of its divisors is an integer number (20108997).

Almost surely, 2^40217993 is an apocalyptic number.

It is an amenable number.

40217993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40217993 is an equidigital number, since it uses as much as digits as its factorization.

40217993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 40217993 is about 6341.7657635709. The cubic root of 40217993 is about 342.6153354443.

The spelling of 40217993 in words is "forty million, two hundred seventeen thousand, nine hundred ninety-three".