33745321 has 2 divisors, whose sum is σ = 33745322. Its totient is φ = 33745320.

The previous prime is 33745319. The next prime is 33745331. The reversal of 33745321 is 12354733.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 14288400 = 4411^2 + 3780^2 .

It is a cyclic number.

It is not a de Polignac number, because 33745321 - 2¹ = 33745319 is a prime.

It is a super-2 number, since 2×33745321² = 2277493378786082, which contains 22 as substring.

Together with 33745319, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 33745321.

It is not a weakly prime, because it can be changed into another prime (33745331) 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, 16872660 + 16872661.

It is an arithmetic number, because the mean of its divisors is an integer number (16872661).

Almost surely, 2^33745321 is an apocalyptic number.

It is an amenable number.

33745321 is a deficient number, since it is larger than the sum of its proper divisors (1).

33745321 is an equidigital number, since it uses as much as digits as its factorization.

33745321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 28.

The square root of 33745321 is about 5809.0723011510. The cubic root of 33745321 is about 323.1502685925.

The spelling of 33745321 in words is "thirty-three million, seven hundred forty-five thousand, three hundred twenty-one".