33973213 has 4 divisors (see below), whose sum is σ = 34064668. Its totient is φ = 33881760.

The previous prime is 33973201. The next prime is 33973223. The reversal of 33973213 is 31237933.

33973213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31237933 = 23 ⋅1358171.

It can be written as a sum of positive squares in 2 ways, for example, as 21883684 + 12089529 = 4678^2 + 3477^2 .

It is a cyclic number.

It is not a de Polignac number, because 33973213 - 2¹⁷ = 33842141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33973223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45168 + ... + 45913.

It is an arithmetic number, because the mean of its divisors is an integer number (8516167).

Almost surely, 2^33973213 is an apocalyptic number.

It is an amenable number.

33973213 is a deficient number, since it is larger than the sum of its proper divisors (91455).

33973213 is an equidigital number, since it uses as much as digits as its factorization.

33973213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91454.

The product of its digits is 10206, while the sum is 31.

The square root of 33973213 is about 5828.6544759490. The cubic root of 33973213 is about 323.8760798521.

The spelling of 33973213 in words is "thirty-three million, nine hundred seventy-three thousand, two hundred thirteen".