2906681 has 2 divisors, whose sum is σ = 2906682. Its totient is φ = 2906680.

The previous prime is 2906663. The next prime is 2906707. The reversal of 2906681 is 1866092.

2906681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1478656 + 1428025 = 1216^2 + 1195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2906681 is a prime.

It is a super-2 number, since 2×2906681² = 16897588871522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2906081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1453340 + 1453341.

It is an arithmetic number, because the mean of its divisors is an integer number (1453341).

2^2906681 is an apocalyptic number.

It is an amenable number.

2906681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2906681 is an equidigital number, since it uses as much as digits as its factorization.

2906681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2906681 is about 1704.8991172501. The cubic root of 2906681 is about 142.7137410043.

The spelling of 2906681 in words is "two million, nine hundred six thousand, six hundred eighty-one".