3665573 has 2 divisors, whose sum is σ = 3665574. Its totient is φ = 3665572.

The previous prime is 3665539. The next prime is 3665581. The reversal of 3665573 is 3755663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2184484 + 1481089 = 1478^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 3665573 - 2⁶ = 3665509 is a prime.

It is a Sophie Germain 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 (3661573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1832786 + 1832787.

It is an arithmetic number, because the mean of its divisors is an integer number (1832787).

Almost surely, 2^3665573 is an apocalyptic number.

It is an amenable number.

3665573 is a deficient number, since it is larger than the sum of its proper divisors (1).

3665573 is an equidigital number, since it uses as much as digits as its factorization.

3665573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 35.

The square root of 3665573 is about 1914.5686198201. The cubic root of 3665573 is about 154.1868340146.

Adding to 3665573 its product of digits (56700), we get a palindrome (3722273).

The spelling of 3665573 in words is "three million, six hundred sixty-five thousand, five hundred seventy-three".