2731889 has 2 divisors, whose sum is σ = 2731890. Its totient is φ = 2731888.

The previous prime is 2731853. The next prime is 2731901. The reversal of 2731889 is 9881372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1420864 + 1311025 = 1192^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731889 - 2¹² = 2727793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2731819) 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, 1365944 + 1365945.

It is an arithmetic number, because the mean of its divisors is an integer number (1365945).

2^2731889 is an apocalyptic number.

It is an amenable number.

2731889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731889 is an equidigital number, since it uses as much as digits as its factorization.

2731889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 2731889 is about 1652.8427027397. The cubic root of 2731889 is about 139.7937268428.

The spelling of 2731889 in words is "two million, seven hundred thirty-one thousand, eight hundred eighty-nine".