33481729 has 2 divisors, whose sum is σ = 33481730. Its totient is φ = 33481728.

The previous prime is 33481627. The next prime is 33481739. The reversal of 33481729 is 92718433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33039504 + 442225 = 5748^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 33481729 - 2²³ = 25093121 is a prime.

It is a super-2 number, since 2×33481729² = 2242052353658882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33481739) 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, 16740864 + 16740865.

It is an arithmetic number, because the mean of its divisors is an integer number (16740865).

Almost surely, 2^33481729 is an apocalyptic number.

It is an amenable number.

33481729 is a deficient number, since it is larger than the sum of its proper divisors (1).

33481729 is an equidigital number, since it uses as much as digits as its factorization.

33481729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 33481729 is about 5786.3398621236. The cubic root of 33481729 is about 322.3066693756.

The spelling of 33481729 in words is "thirty-three million, four hundred eighty-one thousand, seven hundred twenty-nine".