2691589 has 2 divisors, whose sum is σ = 2691590. Its totient is φ = 2691588.

The previous prime is 2691587. The next prime is 2691599. The reversal of 2691589 is 9851962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 574564 = 1455^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691589 - 2¹ = 2691587 is a prime.

Together with 2691587, it forms a pair of twin primes.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2691581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345794 + 1345795.

It is an arithmetic number, because the mean of its divisors is an integer number (1345795).

2^2691589 is an apocalyptic number.

It is an amenable number.

2691589 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691589 is an equidigital number, since it uses as much as digits as its factorization.

2691589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 2691589 is about 1640.6062903695. The cubic root of 2691589 is about 139.1029205145.

The spelling of 2691589 in words is "two million, six hundred ninety-one thousand, five hundred eighty-nine".