2064781 has 2 divisors, whose sum is σ = 2064782. Its totient is φ = 2064780.

The previous prime is 2064767. The next prime is 2064793. The reversal of 2064781 is 1874602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2044900 + 19881 = 1430^2 + 141^2 .

It is a cyclic number.

It is not a de Polignac number, because 2064781 - 2⁷ = 2064653 is a prime.

It is a super-2 number, since 2×2064781² = 8526641155922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2064761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1032390 + 1032391.

It is an arithmetic number, because the mean of its divisors is an integer number (1032391).

2^2064781 is an apocalyptic number.

It is an amenable number.

2064781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2064781 is an equidigital number, since it uses as much as digits as its factorization.

2064781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2064781 is about 1436.9345844540. The cubic root of 2064781 is about 127.3379923614.

The spelling of 2064781 in words is "two million, sixty-four thousand, seven hundred eighty-one".