7647223 has 2 divisors, whose sum is σ = 7647224. Its totient is φ = 7647222.

The previous prime is 7647221. The next prime is 7647259. The reversal of 7647223 is 3227467.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7647223 - 2¹ = 7647221 is a prime.

It is a super-2 number, since 2×7647223² = 116960039223458, which contains 22 as substring.

Together with 7647221, it forms a pair of twin primes.

It is an Ulam number.

It is a d-powerful number, because it can be written as 7⁷ + 6² + 4¹⁰ + 7⁸ + 2¹¹ + 2¹³ + 3³ .

7647223 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7647221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3823611 + 3823612.

It is an arithmetic number, because the mean of its divisors is an integer number (3823612).

Almost surely, 2^7647223 is an apocalyptic number.

7647223 is a deficient number, since it is larger than the sum of its proper divisors (1).

7647223 is an equidigital number, since it uses as much as digits as its factorization.

7647223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 31.

The square root of 7647223 is about 2765.3612783866. The cubic root of 7647223 is about 197.0158885035.

The spelling of 7647223 in words is "seven million, six hundred forty-seven thousand, two hundred twenty-three".