33918881 has 2 divisors, whose sum is σ = 33918882. Its totient is φ = 33918880.

The previous prime is 33918877. The next prime is 33918977. The reversal of 33918881 is 18881933.

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., 33825856 + 93025 = 5816^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 33918881 - 2² = 33918877 is a prime.

It is a super-2 number, since 2×33918881² = 2300980976584322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33918811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16959440 + 16959441.

It is an arithmetic number, because the mean of its divisors is an integer number (16959441).

Almost surely, 2^33918881 is an apocalyptic number.

It is an amenable number.

33918881 is a deficient number, since it is larger than the sum of its proper divisors (1).

33918881 is an equidigital number, since it uses as much as digits as its factorization.

33918881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 33918881 is about 5823.9918440877. The cubic root of 33918881 is about 323.7033337129.

The spelling of 33918881 in words is "thirty-three million, nine hundred eighteen thousand, eight hundred eighty-one".