33064781 has 2 divisors, whose sum is σ = 33064782. Its totient is φ = 33064780.

The previous prime is 33064753. The next prime is 33064783. The reversal of 33064781 is 18746033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21949225 + 11115556 = 4685^2 + 3334^2 .

It is an emirp because it is prime and its reverse (18746033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33064781 - 2¹⁰ = 33063757 is a prime.

It is a super-2 number, since 2×33064781² = 2186559485155922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 33064783, it forms a pair of twin primes.

It is a Chen 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 (33064783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16532390 + 16532391.

It is an arithmetic number, because the mean of its divisors is an integer number (16532391).

Almost surely, 2^33064781 is an apocalyptic number.

It is an amenable number.

33064781 is a deficient number, since it is larger than the sum of its proper divisors (1).

33064781 is an equidigital number, since it uses as much as digits as its factorization.

33064781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 33064781 is about 5750.1983444052. The cubic root of 33064781 is about 320.9631819523.

The spelling of 33064781 in words is "thirty-three million, sixty-four thousand, seven hundred eighty-one".