2093701781 has 2 divisors, whose sum is σ = 2093701782. Its totient is φ = 2093701780.

The previous prime is 2093701733. The next prime is 2093701783. The reversal of 2093701781 is 1871073902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1431411556 + 662290225 = 37834^2 + 25735^2 .

It is a cyclic number.

It is not a de Polignac number, because 2093701781 - 2⁶ = 2093701717 is a prime.

It is a super-2 number, since 2×2093701781² = 8767174295525143922, which contains 22 as substring.

Together with 2093701783, 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 (2093701783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1046850890 + 1046850891.

It is an arithmetic number, because the mean of its divisors is an integer number (1046850891).

Almost surely, 2^2093701781 is an apocalyptic number.

It is an amenable number.

2093701781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2093701781 is an equidigital number, since it uses as much as digits as its factorization.

2093701781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 2093701781 is about 45756.9861441944. The cubic root of 2093701781 is about 1279.2976658482.

The spelling of 2093701781 in words is "two billion, ninety-three million, seven hundred one thousand, seven hundred eighty-one".