2097681 has 8 divisors (see below), whose sum is σ = 2961504. Its totient is φ = 1316160.

The previous prime is 2097679. The next prime is 2097709. The reversal of 2097681 is 1867902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2097681 - 2¹ = 2097679 is a prime.

It is a super-2 number, since 2×2097681² = 8800531155522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2097611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20515 + ... + 20616.

It is an arithmetic number, because the mean of its divisors is an integer number (370188).

2^2097681 is an apocalyptic number.

It is an amenable number.

2097681 is a deficient number, since it is larger than the sum of its proper divisors (863823).

2097681 is a wasteful number, since it uses less digits than its factorization.

2097681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41151.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 2097681 is about 1448.3373225875. The cubic root of 2097681 is about 128.0107616277.

The spelling of 2097681 in words is "two million, ninety-seven thousand, six hundred eighty-one".