33398881 has 2 divisors, whose sum is σ = 33398882. Its totient is φ = 33398880.

The previous prime is 33398867. The next prime is 33398891. The reversal of 33398881 is 18889333.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30902481 + 2496400 = 5559^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 33398881 - 2¹¹ = 33396833 is a prime.

It is a super-2 number, since 2×33398881² = 2230970504104322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33398891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16699440 + 16699441.

It is an arithmetic number, because the mean of its divisors is an integer number (16699441).

Almost surely, 2^33398881 is an apocalyptic number.

It is an amenable number.

33398881 is a deficient number, since it is larger than the sum of its proper divisors (1).

33398881 is an equidigital number, since it uses as much as digits as its factorization.

33398881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 33398881 is about 5779.1764984295. The cubic root of 33398881 is about 322.0406086665.

The spelling of 33398881 in words is "thirty-three million, three hundred ninety-eight thousand, eight hundred eighty-one".