33394813 has 2 divisors, whose sum is σ = 33394814. Its totient is φ = 33394812.

The previous prime is 33394811. The next prime is 33394853. The reversal of 33394813 is 31849333.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23396569 + 9998244 = 4837^2 + 3162^2 .

It is a cyclic number.

It is not a de Polignac number, because 33394813 - 2¹ = 33394811 is a prime.

It is a super-2 number, since 2×33394813² = 2230427070609938, which contains 22 as substring.

Together with 33394811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33394811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16697406 + 16697407.

It is an arithmetic number, because the mean of its divisors is an integer number (16697407).

Almost surely, 2^33394813 is an apocalyptic number.

It is an amenable number.

33394813 is a deficient number, since it is larger than the sum of its proper divisors (1).

33394813 is an equidigital number, since it uses as much as digits as its factorization.

33394813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 33394813 is about 5778.8245344534. The cubic root of 33394813 is about 322.0275332346.

The spelling of 33394813 in words is "thirty-three million, three hundred ninety-four thousand, eight hundred thirteen".