7981223 has 2 divisors, whose sum is σ = 7981224. Its totient is φ = 7981222.

The previous prime is 7981189. The next prime is 7981231. The reversal of 7981223 is 3221897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7981223 - 2²² = 3786919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7981223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7981283) 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, 3990611 + 3990612.

It is an arithmetic number, because the mean of its divisors is an integer number (3990612).

Almost surely, 2^7981223 is an apocalyptic number.

7981223 is a deficient number, since it is larger than the sum of its proper divisors (1).

7981223 is an equidigital number, since it uses as much as digits as its factorization.

7981223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 7981223 is about 2825.1058387253. The cubic root of 7981223 is about 199.8434024180.

The spelling of 7981223 in words is "seven million, nine hundred eighty-one thousand, two hundred twenty-three".