2093681 has 4 divisors (see below), whose sum is σ = 2114112. Its totient is φ = 2073252.

The previous prime is 2093653. The next prime is 2093699. The reversal of 2093681 is 1863902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2093681 - 2⁶ = 2093617 is a prime.

It is a super-2 number, since 2×2093681² = 8767000259522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2093081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10061 + ... + 10266.

It is an arithmetic number, because the mean of its divisors is an integer number (528528).

2^2093681 is an apocalyptic number.

It is an amenable number.

2093681 is a deficient number, since it is larger than the sum of its proper divisors (20431).

2093681 is a wasteful number, since it uses less digits than its factorization.

2093681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20430.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2093681 is about 1446.9557698838. The cubic root of 2093681 is about 127.9293433285.

The spelling of 2093681 in words is "two million, ninety-three thousand, six hundred eighty-one".