33145009 has 2 divisors, whose sum is σ = 33145010. Its totient is φ = 33145008.

The previous prime is 33144977. The next prime is 33145027. The reversal of 33145009 is 90054133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 11242609 = 4680^2 + 3353^2 .

It is a cyclic number.

It is not a de Polignac number, because 33145009 - 2⁵ = 33144977 is a prime.

It is a super-2 number, since 2×33145009² = 2197183243220162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33145109) 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 as a sum of consecutive naturals, namely, 16572504 + 16572505.

It is an arithmetic number, because the mean of its divisors is an integer number (16572505).

Almost surely, 2^33145009 is an apocalyptic number.

It is an amenable number.

33145009 is a deficient number, since it is larger than the sum of its proper divisors (1).

33145009 is an equidigital number, since it uses as much as digits as its factorization.

33145009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 33145009 is about 5757.1702250324. The cubic root of 33145009 is about 321.2225660535. Note that the first 3 decimals are identical.

The spelling of 33145009 in words is "thirty-three million, one hundred forty-five thousand, nine".