33640069 has 2 divisors, whose sum is σ = 33640070. Its totient is φ = 33640068.

The previous prime is 33640063. The next prime is 33640073. The reversal of 33640069 is 96004633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33350625 + 289444 = 5775^2 + 538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33640069 is a prime.

It is a super-2 number, since 2×33640069² = 2263308484649522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33640069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33640063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16820034 + 16820035.

It is an arithmetic number, because the mean of its divisors is an integer number (16820035).

Almost surely, 2^33640069 is an apocalyptic number.

It is an amenable number.

33640069 is a deficient number, since it is larger than the sum of its proper divisors (1).

33640069 is an equidigital number, since it uses as much as digits as its factorization.

33640069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 33640069 is about 5800.0059482728. The cubic root of 33640069 is about 322.8139490284.

The spelling of 33640069 in words is "thirty-three million, six hundred forty thousand, sixty-nine".