33533989 has 4 divisors (see below), whose sum is σ = 33574156. Its totient is φ = 33493824.

The previous prime is 33533987. The next prime is 33534041. The reversal of 33533989 is 98933533.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10176100 + 23357889 = 3190^2 + 4833^2 .

It is a cyclic number.

It is not a de Polignac number, because 33533989 - 2¹ = 33533987 is a prime.

It is a super-2 number, since 2×33533989² = 2249056836504242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33533987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18804 + ... + 20509.

It is an arithmetic number, because the mean of its divisors is an integer number (8393539).

Almost surely, 2^33533989 is an apocalyptic number.

It is an amenable number.

33533989 is a deficient number, since it is larger than the sum of its proper divisors (40167).

33533989 is an equidigital number, since it uses as much as digits as its factorization.

33533989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40166.

The product of its digits is 262440, while the sum is 43.

The square root of 33533989 is about 5790.8539093989. The cubic root of 33533989 is about 322.4742731315.

The spelling of 33533989 in words is "thirty-three million, five hundred thirty-three thousand, nine hundred eighty-nine".