40645133 has 2 divisors, whose sum is σ = 40645134. Its totient is φ = 40645132.

The previous prime is 40645103. The next prime is 40645217. The reversal of 40645133 is 33154604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36264484 + 4380649 = 6022^2 + 2093^2 .

It is a cyclic number.

It is not a de Polignac number, because 40645133 - 2⁶ = 40645069 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40645103) 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, 20322566 + 20322567.

It is an arithmetic number, because the mean of its divisors is an integer number (20322567).

Almost surely, 2^40645133 is an apocalyptic number.

It is an amenable number.

40645133 is a deficient number, since it is larger than the sum of its proper divisors (1).

40645133 is an equidigital number, since it uses as much as digits as its factorization.

40645133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 40645133 is about 6375.3535588232. The cubic root of 40645133 is about 343.8239956188.

Adding to 40645133 its reverse (33154604), we get a palindrome (73799737).

The spelling of 40645133 in words is "forty million, six hundred forty-five thousand, one hundred thirty-three".