3640223 has 2 divisors, whose sum is σ = 3640224. Its totient is φ = 3640222.

The previous prime is 3640207. The next prime is 3640243. The reversal of 3640223 is 3220463.

It is an a-pointer prime, because the next prime (3640243) can be obtained adding 3640223 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3640223 - 2⁴ = 3640207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3640195 and 3640204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3640243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820111 + 1820112.

It is an arithmetic number, because the mean of its divisors is an integer number (1820112).

Almost surely, 2^3640223 is an apocalyptic number.

3640223 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640223 is an equidigital number, since it uses as much as digits as its factorization.

3640223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 3640223 is about 1907.9368438185. The cubic root of 3640223 is about 153.8305749032.

Adding to 3640223 its reverse (3220463), we get a palindrome (6860686).

The spelling of 3640223 in words is "three million, six hundred forty thousand, two hundred twenty-three".