1216386467 has 2 divisors, whose sum is σ = 1216386468. Its totient is φ = 1216386466.

The previous prime is 1216386449. The next prime is 1216386503. The reversal of 1216386467 is 7646836121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216386467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216386667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608193233 + 608193234.

It is an arithmetic number, because the mean of its divisors is an integer number (608193234).

Almost surely, 2^1216386467 is an apocalyptic number.

1216386467 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216386467 is an equidigital number, since it uses as much as digits as its factorization.

1216386467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 1216386467 is about 34876.7324587611. The cubic root of 1216386467 is about 1067.4737230797.

The spelling of 1216386467 in words is "one billion, two hundred sixteen million, three hundred eighty-six thousand, four hundred sixty-seven".