2261789 has 2 divisors, whose sum is σ = 2261790. Its totient is φ = 2261788.

The previous prime is 2261771. The next prime is 2261801. The reversal of 2261789 is 9871622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2199289 + 62500 = 1483^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261789 - 2¹² = 2257693 is a prime.

It is a super-4 number, since 4×2261789⁴ (a number of 27 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130894 + 1130895.

It is an arithmetic number, because the mean of its divisors is an integer number (1130895).

2^2261789 is an apocalyptic number.

It is an amenable number.

2261789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261789 is an equidigital number, since it uses as much as digits as its factorization.

2261789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 2261789 is about 1503.9245326811. The cubic root of 2261789 is about 131.2655298328.

The spelling of 2261789 in words is "two million, two hundred sixty-one thousand, seven hundred eighty-nine".