2193941888309 has 2 divisors, whose sum is σ = 2193941888310. Its totient is φ = 2193941888308.

The previous prime is 2193941888291. The next prime is 2193941888311. The reversal of 2193941888309 is 9038881493912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2189520968209 + 4420920100 = 1479703^2 + 66490^2 .

It is a cyclic number.

It is not a de Polignac number, because 2193941888309 - 2¹⁶ = 2193941822773 is a prime.

Together with 2193941888311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2193941882309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1096970944154 + 1096970944155.

It is an arithmetic number, because the mean of its divisors is an integer number (1096970944155).

Almost surely, 2^{2193941888309} is an apocalyptic number.

It is an amenable number.

2193941888309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2193941888309 is an equidigital number, since it uses as much as digits as its factorization.

2193941888309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26873856, while the sum is 65.

The spelling of 2193941888309 in words is "two trillion, one hundred ninety-three billion, nine hundred forty-one million, eight hundred eighty-eight thousand, three hundred nine".