33689021 has 4 divisors (see below), whose sum is σ = 33703200. Its totient is φ = 33674844.

The previous prime is 33689011. The next prime is 33689041. The reversal of 33689021 is 12098633.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33689021 is a prime.

It is a super-2 number, since 2×33689021² = 2269900271876882, 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 (33689011) 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 in 3 ways as a sum of consecutive naturals, for example, 2561 + ... + 8598.

It is an arithmetic number, because the mean of its divisors is an integer number (8425800).

Almost surely, 2^33689021 is an apocalyptic number.

It is an amenable number.

33689021 is a deficient number, since it is larger than the sum of its proper divisors (14179).

33689021 is a wasteful number, since it uses less digits than its factorization.

33689021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14178.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 33689021 is about 5804.2244098587. The cubic root of 33689021 is about 322.9704561347.

The spelling of 33689021 in words is "thirty-three million, six hundred eighty-nine thousand, twenty-one".