1213712327 has 2 divisors, whose sum is σ = 1213712328. Its totient is φ = 1213712326.

The previous prime is 1213712273. The next prime is 1213712329. The reversal of 1213712327 is 7232173121.

Together with previous prime (1213712273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213712327 is a prime.

It is a super-2 number, since 2×1213712327² = 2946195225423509858, which contains 22 as substring.

Together with 1213712329, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213712327.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213712329) 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, 606856163 + 606856164.

It is an arithmetic number, because the mean of its divisors is an integer number (606856164).

Almost surely, 2^1213712327 is an apocalyptic number.

1213712327 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213712327 is an equidigital number, since it uses as much as digits as its factorization.

1213712327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 1213712327 is about 34838.3743449662. The cubic root of 1213712327 is about 1066.6908938616.

Adding to 1213712327 its reverse (7232173121), we get a palindrome (8445885448).

The spelling of 1213712327 in words is "one billion, two hundred thirteen million, seven hundred twelve thousand, three hundred twenty-seven".