33668149 has 4 divisors (see below), whose sum is σ = 33690636. Its totient is φ = 33645664.

The previous prime is 33668147. The next prime is 33668233. The reversal of 33668149 is 94186633.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94186633 = 23 ⋅4095071.

It can be written as a sum of positive squares in 2 ways, for example, as 15944049 + 17724100 = 3993^2 + 4210^2 .

It is a cyclic number.

It is not a de Polignac number, because 33668149 - 2¹ = 33668147 is a prime.

It is a super-3 number, since 3×33668149³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33668147) 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, 8824 + ... + 12049.

It is an arithmetic number, because the mean of its divisors is an integer number (8422659).

Almost surely, 2^33668149 is an apocalyptic number.

It is an amenable number.

33668149 is a deficient number, since it is larger than the sum of its proper divisors (22487).

33668149 is a wasteful number, since it uses less digits than its factorization.

33668149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22486.

The product of its digits is 93312, while the sum is 40.

The square root of 33668149 is about 5802.4261305078. The cubic root of 33668149 is about 322.9037436789.

The spelling of 33668149 in words is "thirty-three million, six hundred sixty-eight thousand, one hundred forty-nine".