33394561 has 2 divisors, whose sum is σ = 33394562. Its totient is φ = 33394560.

The previous prime is 33394549. The next prime is 33394567. The reversal of 33394561 is 16549333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31990336 + 1404225 = 5656^2 + 1185^2 .

It is an emirp because it is prime and its reverse (16549333) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33394561 - 2⁷ = 33394433 is a prime.

It is a super-2 number, since 2×33394561² = 2230393408765442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33394567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16697280 + 16697281.

It is an arithmetic number, because the mean of its divisors is an integer number (16697281).

Almost surely, 2^33394561 is an apocalyptic number.

It is an amenable number.

33394561 is a deficient number, since it is larger than the sum of its proper divisors (1).

33394561 is an equidigital number, since it uses as much as digits as its factorization.

33394561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 34.

The square root of 33394561 is about 5778.8027306701. The cubic root of 33394561 is about 322.0267232171.

The spelling of 33394561 in words is "thirty-three million, three hundred ninety-four thousand, five hundred sixty-one".