1216746227 has 2 divisors, whose sum is σ = 1216746228. Its totient is φ = 1216746226.

The previous prime is 1216746211. The next prime is 1216746247. The reversal of 1216746227 is 7226476121.

It is a weak prime.

It is an emirp because it is prime and its reverse (7226476121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1216746227 - 2⁴ = 1216746211 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216746247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608373113 + 608373114.

It is an arithmetic number, because the mean of its divisors is an integer number (608373114).

Almost surely, 2^1216746227 is an apocalyptic number.

1216746227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216746227 is an equidigital number, since it uses as much as digits as its factorization.

1216746227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 38.

The square root of 1216746227 is about 34881.8896707159. The cubic root of 1216746227 is about 1067.5789518324.

The spelling of 1216746227 in words is "one billion, two hundred sixteen million, seven hundred forty-six thousand, two hundred twenty-seven".