2731189 has 2 divisors, whose sum is σ = 2731190. Its totient is φ = 2731188.

The previous prime is 2731187. The next prime is 2731199. The reversal of 2731189 is 9811372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1664100 + 1067089 = 1290^2 + 1033^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731189 - 2¹ = 2731187 is a prime.

Together with 2731187, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2731189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2731187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365594 + 1365595.

It is an arithmetic number, because the mean of its divisors is an integer number (1365595).

2^2731189 is an apocalyptic number.

It is an amenable number.

2731189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731189 is an equidigital number, since it uses as much as digits as its factorization.

2731189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 2731189 is about 1652.6309327857. The cubic root of 2731189 is about 139.7817859028.

The spelling of 2731189 in words is "two million, seven hundred thirty-one thousand, one hundred eighty-nine".