1223420273 has 2 divisors, whose sum is σ = 1223420274. Its totient is φ = 1223420272.

The previous prime is 1223420243. The next prime is 1223420287. The reversal of 1223420273 is 3720243221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 951599104 + 271821169 = 30848^2 + 16487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223420273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223420243) 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, 611710136 + 611710137.

It is an arithmetic number, because the mean of its divisors is an integer number (611710137).

Almost surely, 2^1223420273 is an apocalyptic number.

It is an amenable number.

1223420273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223420273 is an equidigital number, since it uses as much as digits as its factorization.

1223420273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 1223420273 is about 34977.4251911143. The cubic root of 1223420273 is about 1069.5273403700.

Adding to 1223420273 its reverse (3720243221), we get a palindrome (4943663494).

The spelling of 1223420273 in words is "one billion, two hundred twenty-three million, four hundred twenty thousand, two hundred seventy-three".