33640003 has 2 divisors, whose sum is σ = 33640004. Its totient is φ = 33640002.

The previous prime is 33639997. The next prime is 33640021. The reversal of 33640003 is 30004633.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33640003 - 2¹³ = 33631811 is a prime.

It is a super-2 number, since 2×33640003² = 2263299603680018, which contains 22 as substring.

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, 16820001 + 16820002.

It is an arithmetic number, because the mean of its divisors is an integer number (16820002).

Almost surely, 2^33640003 is an apocalyptic number.

33640003 is a deficient number, since it is larger than the sum of its proper divisors (1).

33640003 is an equidigital number, since it uses as much as digits as its factorization.

33640003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 33640003 is about 5800.0002586207. Note that the first 3 decimals coincide. The cubic root of 33640003 is about 322.8137379137.

Adding to 33640003 its reverse (30004633), we get a palindrome (63644636).

The spelling of 33640003 in words is "thirty-three million, six hundred forty thousand, three".