33481909 has 2 divisors, whose sum is σ = 33481910. Its totient is φ = 33481908.

The previous prime is 33481883. The next prime is 33481913. The reversal of 33481909 is 90918433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18037009 + 15444900 = 4247^2 + 3930^2 .

It is an emirp because it is prime and its reverse (90918433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33481909 - 2⁹ = 33481397 is a prime.

It is a super-2 number, since 2×33481909² = 2242076460568562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33481919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16740954 + 16740955.

It is an arithmetic number, because the mean of its divisors is an integer number (16740955).

Almost surely, 2^33481909 is an apocalyptic number.

It is an amenable number.

33481909 is a deficient number, since it is larger than the sum of its proper divisors (1).

33481909 is an equidigital number, since it uses as much as digits as its factorization.

33481909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 33481909 is about 5786.3554159765. The cubic root of 33481909 is about 322.3072469553.

The spelling of 33481909 in words is "thirty-three million, four hundred eighty-one thousand, nine hundred nine".