1218380767 has 2 divisors, whose sum is σ = 1218380768. Its totient is φ = 1218380766.

The previous prime is 1218380747. The next prime is 1218380773. The reversal of 1218380767 is 7670838121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1218380767 - 2²⁷ = 1084163039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218380707) 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, 609190383 + 609190384.

It is an arithmetic number, because the mean of its divisors is an integer number (609190384).

Almost surely, 2^1218380767 is an apocalyptic number.

1218380767 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218380767 is an equidigital number, since it uses as much as digits as its factorization.

1218380767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 1218380767 is about 34905.3114439622. The cubic root of 1218380767 is about 1068.0567889936.

The spelling of 1218380767 in words is "one billion, two hundred eighteen million, three hundred eighty thousand, seven hundred sixty-seven".