7644223 has 2 divisors, whose sum is σ = 7644224. Its totient is φ = 7644222.

The previous prime is 7644199. The next prime is 7644229. The reversal of 7644223 is 3224467.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7644223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7644191 and 7644200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7644229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3822111 + 3822112.

It is an arithmetic number, because the mean of its divisors is an integer number (3822112).

Almost surely, 2^7644223 is an apocalyptic number.

7644223 is a deficient number, since it is larger than the sum of its proper divisors (1).

7644223 is an equidigital number, since it uses as much as digits as its factorization.

7644223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 28.

The square root of 7644223 is about 2764.8188005727. The cubic root of 7644223 is about 196.9901220708.

The spelling of 7644223 in words is "seven million, six hundred forty-four thousand, two hundred twenty-three".