2093981 has 2 divisors, whose sum is σ = 2093982. Its totient is φ = 2093980.

The previous prime is 2093953. The next prime is 2094011. The reversal of 2093981 is 1893902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1301881 + 792100 = 1141^2 + 890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2093981 is a prime.

It is a super-2 number, since 2×2093981² = 8769512856722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2093081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1046990 + 1046991.

It is an arithmetic number, because the mean of its divisors is an integer number (1046991).

2^2093981 is an apocalyptic number.

It is an amenable number.

2093981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2093981 is an equidigital number, since it uses as much as digits as its factorization.

2093981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2093981 is about 1447.0594320898. The cubic root of 2093981 is about 127.9354532963.

The spelling of 2093981 in words is "two million, ninety-three thousand, nine hundred eighty-one".