33721069 has 2 divisors, whose sum is σ = 33721070. Its totient is φ = 33721068.

The previous prime is 33721063. The next prime is 33721117. The reversal of 33721069 is 96012733.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31866025 + 1855044 = 5645^2 + 1362^2 .

It is a cyclic number.

It is not a de Polignac number, because 33721069 - 2⁷ = 33720941 is a prime.

It is a super-2 number, since 2×33721069² = 2274220989005522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33721069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33721063) 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, 16860534 + 16860535.

It is an arithmetic number, because the mean of its divisors is an integer number (16860535).

Almost surely, 2^33721069 is an apocalyptic number.

It is an amenable number.

33721069 is a deficient number, since it is larger than the sum of its proper divisors (1).

33721069 is an equidigital number, since it uses as much as digits as its factorization.

33721069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 33721069 is about 5806.9845014431. The cubic root of 33721069 is about 323.0728364403.

The spelling of 33721069 in words is "thirty-three million, seven hundred twenty-one thousand, sixty-nine".