2743861 has 2 divisors, whose sum is σ = 2743862. Its totient is φ = 2743860.

The previous prime is 2743859. The next prime is 2743901. The reversal of 2743861 is 1683472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2280100 + 463761 = 1510^2 + 681^2 .

It is a cyclic number.

It is not a de Polignac number, because 2743861 - 2¹ = 2743859 is a prime.

Together with 2743859, it forms a pair of twin primes.

2743861 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2743561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1371930 + 1371931.

It is an arithmetic number, because the mean of its divisors is an integer number (1371931).

2^2743861 is an apocalyptic number.

It is an amenable number.

2743861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2743861 is an equidigital number, since it uses as much as digits as its factorization.

2743861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 2743861 is about 1656.4603828646. The cubic root of 2743861 is about 139.9976360145.

The spelling of 2743861 in words is "two million, seven hundred forty-three thousand, eight hundred sixty-one".