2723881 has 2 divisors, whose sum is σ = 2723882. Its totient is φ = 2723880.

The previous prime is 2723879. The next prime is 2723887. The reversal of 2723881 is 1883272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1755625 + 968256 = 1325^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 2723881 - 2¹ = 2723879 is a prime.

It is a super-2 number, since 2×2723881² = 14839055404322, which contains 22 as substring.

Together with 2723879, it forms a pair of twin primes.

2723881 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2723887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1361940 + 1361941.

It is an arithmetic number, because the mean of its divisors is an integer number (1361941).

2^2723881 is an apocalyptic number.

It is an amenable number.

2723881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2723881 is an equidigital number, since it uses as much as digits as its factorization.

2723881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 2723881 is about 1650.4184317924. The cubic root of 2723881 is about 139.6570004747.

The spelling of 2723881 in words is "two million, seven hundred twenty-three thousand, eight hundred eighty-one".