33368381 has 2 divisors, whose sum is σ = 33368382. Its totient is φ = 33368380.

The previous prime is 33368353. The next prime is 33368393. The reversal of 33368381 is 18386333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21576025 + 11792356 = 4645^2 + 3434^2 .

It is a cyclic number.

It is not a de Polignac number, because 33368381 - 2¹⁰ = 33367357 is a prime.

It is a super-2 number, since 2×33368381² = 2226897701122322, which contains 22 as substring.

It is a Sophie Germain prime.

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 (33368341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16684190 + 16684191.

It is an arithmetic number, because the mean of its divisors is an integer number (16684191).

Almost surely, 2^33368381 is an apocalyptic number.

It is an amenable number.

33368381 is a deficient number, since it is larger than the sum of its proper divisors (1).

33368381 is an equidigital number, since it uses as much as digits as its factorization.

33368381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 33368381 is about 5776.5371114535. The cubic root of 33368381 is about 321.9425491938.

The spelling of 33368381 in words is "thirty-three million, three hundred sixty-eight thousand, three hundred eighty-one".