2705981 has 2 divisors, whose sum is σ = 2705982. Its totient is φ = 2705980.

The previous prime is 2705977. The next prime is 2705993. The reversal of 2705981 is 1895072.

2705981 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., 2464900 + 241081 = 1570^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 2705981 - 2² = 2705977 is a prime.

It is a super-2 number, since 2×2705981² = 14644666344722, 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 (2705951) 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, 1352990 + 1352991.

It is an arithmetic number, because the mean of its divisors is an integer number (1352991).

2^2705981 is an apocalyptic number.

It is an amenable number.

2705981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2705981 is an equidigital number, since it uses as much as digits as its factorization.

2705981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 2705981 is about 1644.9866260855. The cubic root of 2705981 is about 139.3504089683.

The spelling of 2705981 in words is "two million, seven hundred five thousand, nine hundred eighty-one".