1223404543 has 2 divisors, whose sum is σ = 1223404544. Its totient is φ = 1223404542.

The previous prime is 1223404513. The next prime is 1223404577. The reversal of 1223404543 is 3454043221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223404543 - 2¹³ = 1223396351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223404513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611702271 + 611702272.

It is an arithmetic number, because the mean of its divisors is an integer number (611702272).

Almost surely, 2^1223404543 is an apocalyptic number.

1223404543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223404543 is an equidigital number, since it uses as much as digits as its factorization.

1223404543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 1223404543 is about 34977.2003310728. The cubic root of 1223404543 is about 1069.5227565712.

Adding to 1223404543 its reverse (3454043221), we get a palindrome (4677447764).

The spelling of 1223404543 in words is "one billion, two hundred twenty-three million, four hundred four thousand, five hundred forty-three".