33318889 has 2 divisors, whose sum is σ = 33318890. Its totient is φ = 33318888.

The previous prime is 33318877. The next prime is 33318931. The reversal of 33318889 is 98881333.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31584400 + 1734489 = 5620^2 + 1317^2 .

It is a cyclic number.

It is not a de Polignac number, because 33318889 - 2¹¹ = 33316841 is a prime.

It is a super-2 number, since 2×33318889² = 2220296728388642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33312889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16659444 + 16659445.

It is an arithmetic number, because the mean of its divisors is an integer number (16659445).

Almost surely, 2^33318889 is an apocalyptic number.

It is an amenable number.

33318889 is a deficient number, since it is larger than the sum of its proper divisors (1).

33318889 is an equidigital number, since it uses as much as digits as its factorization.

33318889 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 33318889 is about 5772.2516403913. The cubic root of 33318889 is about 321.7833019840.

The spelling of 33318889 in words is "thirty-three million, three hundred eighteen thousand, eight hundred eighty-nine".