1223204357 has 2 divisors, whose sum is σ = 1223204358. Its totient is φ = 1223204356.

The previous prime is 1223204303. The next prime is 1223204441. The reversal of 1223204357 is 7534023221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1194324481 + 28879876 = 34559^2 + 5374^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223204357 - 2²⁴ = 1206427141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223204057) 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, 611602178 + 611602179.

It is an arithmetic number, because the mean of its divisors is an integer number (611602179).

Almost surely, 2^1223204357 is an apocalyptic number.

It is an amenable number.

1223204357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223204357 is an equidigital number, since it uses as much as digits as its factorization.

1223204357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 1223204357 is about 34974.3385498568. The cubic root of 1223204357 is about 1069.4644179612.

Adding to 1223204357 its reverse (7534023221), we get a palindrome (8757227578).

The spelling of 1223204357 in words is "one billion, two hundred twenty-three million, two hundred four thousand, three hundred fifty-seven".