1243503223 has 2 divisors, whose sum is σ = 1243503224. Its totient is φ = 1243503222.

The previous prime is 1243503181. The next prime is 1243503251. The reversal of 1243503223 is 3223053421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243503223 is a prime.

It is a super-2 number, since 2×1243503223² = 3092600531222775458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243503263) 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, 621751611 + 621751612.

It is an arithmetic number, because the mean of its divisors is an integer number (621751612).

Almost surely, 2^1243503223 is an apocalyptic number.

1243503223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243503223 is an equidigital number, since it uses as much as digits as its factorization.

1243503223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 1243503223 is about 35263.3410640569. The cubic root of 1243503223 is about 1075.3478515178.

Adding to 1243503223 its reverse (3223053421), we get a palindrome (4466556644).

The spelling of 1243503223 in words is "one billion, two hundred forty-three million, five hundred three thousand, two hundred twenty-three".