33648421 has 2 divisors, whose sum is σ = 33648422. Its totient is φ = 33648420.

The previous prime is 33648383. The next prime is 33648451. The reversal of 33648421 is 12484633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 5239521 = 5330^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 33648421 - 2¹¹ = 33646373 is a prime.

It is a super-2 number, since 2×33648421² = 2264432471586482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33648451) 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, 16824210 + 16824211.

It is an arithmetic number, because the mean of its divisors is an integer number (16824211).

Almost surely, 2^33648421 is an apocalyptic number.

It is an amenable number.

33648421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33648421 is an equidigital number, since it uses as much as digits as its factorization.

33648421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 33648421 is about 5800.7259028504. The cubic root of 33648421 is about 322.8406624001.

The spelling of 33648421 in words is "thirty-three million, six hundred forty-eight thousand, four hundred twenty-one".