1213323247 has 2 divisors, whose sum is σ = 1213323248. Its totient is φ = 1213323246.

The previous prime is 1213323193. The next prime is 1213323343. The reversal of 1213323247 is 7423233121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213323247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213363247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606661623 + 606661624.

It is an arithmetic number, because the mean of its divisors is an integer number (606661624).

Almost surely, 2^1213323247 is an apocalyptic number.

1213323247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213323247 is an equidigital number, since it uses as much as digits as its factorization.

1213323247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 28.

The square root of 1213323247 is about 34832.7898251059. The cubic root of 1213323247 is about 1066.5768985762.

Adding to 1213323247 its reverse (7423233121), we get a palindrome (8636556368).

The spelling of 1213323247 in words is "one billion, two hundred thirteen million, three hundred twenty-three thousand, two hundred forty-seven".