2591209 has 2 divisors, whose sum is σ = 2591210. Its totient is φ = 2591208.

The previous prime is 2591189. The next prime is 2591213. The reversal of 2591209 is 9021952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 157609 = 1560^2 + 397^2 .

It is a cyclic number.

It is not a de Polignac number, because 2591209 - 2¹¹ = 2589161 is a prime.

It is not a weakly prime, because it can be changed into another prime (2591269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1295604 + 1295605.

It is an arithmetic number, because the mean of its divisors is an integer number (1295605).

2^2591209 is an apocalyptic number.

It is an amenable number.

2591209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2591209 is an equidigital number, since it uses as much as digits as its factorization.

2591209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 2591209 is about 1609.7232681427. The cubic root of 2591209 is about 137.3517343982.

The spelling of 2591209 in words is "two million, five hundred ninety-one thousand, two hundred nine".