1213356247 has 2 divisors, whose sum is σ = 1213356248. Its totient is φ = 1213356246.

The previous prime is 1213356197. The next prime is 1213356251. The reversal of 1213356247 is 7426533121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213356247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213356257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606678123 + 606678124.

It is an arithmetic number, because the mean of its divisors is an integer number (606678124).

Almost surely, 2^1213356247 is an apocalyptic number.

1213356247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213356247 is an equidigital number, since it uses as much as digits as its factorization.

1213356247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 1213356247 is about 34833.2635134866. The cubic root of 1213356247 is about 1066.5865680847.

Adding to 1213356247 its reverse (7426533121), we get a palindrome (8639889368).

The spelling of 1213356247 in words is "one billion, two hundred thirteen million, three hundred fifty-six thousand, two hundred forty-seven".