216949942093 has 2 divisors, whose sum is σ = 216949942094. Its totient is φ = 216949942092.

The previous prime is 216949942073. The next prime is 216949942141. The reversal of 216949942093 is 390249949612.

216949942093 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., 203016028329 + 13933913764 = 450573^2 + 118042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216949942093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216949942073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108474971046 + 108474971047.

It is an arithmetic number, because the mean of its divisors is an integer number (108474971047).

Almost surely, 2^216949942093 is an apocalyptic number.

It is an amenable number.

216949942093 is a deficient number, since it is larger than the sum of its proper divisors (1).

216949942093 is an equidigital number, since it uses as much as digits as its factorization.

216949942093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7558272, while the sum is 58.

The spelling of 216949942093 in words is "two hundred sixteen billion, nine hundred forty-nine million, nine hundred forty-two thousand, ninety-three".