2289871 has 2 divisors, whose sum is σ = 2289872. Its totient is φ = 2289870.

The previous prime is 2289863. The next prime is 2289901. The reversal of 2289871 is 1789822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2289871 - 2³ = 2289863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2289871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2289841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144935 + 1144936.

It is an arithmetic number, because the mean of its divisors is an integer number (1144936).

2^2289871 is an apocalyptic number.

2289871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2289871 is an equidigital number, since it uses as much as digits as its factorization.

2289871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 37.

The square root of 2289871 is about 1513.2319716422. The cubic root of 2289871 is about 131.8065539558.

It can be divided in two parts, 2289 and 871, that added together give a triangular number (3160 = T₇₉).

The spelling of 2289871 in words is "two million, two hundred eighty-nine thousand, eight hundred seventy-one".