1218780463 has 2 divisors, whose sum is σ = 1218780464. Its totient is φ = 1218780462.

The previous prime is 1218780389. The next prime is 1218780551. The reversal of 1218780463 is 3640878121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3640878121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1218780463 - 2⁹ = 1218779951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218780263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609390231 + 609390232.

It is an arithmetic number, because the mean of its divisors is an integer number (609390232).

Almost surely, 2^1218780463 is an apocalyptic number.

1218780463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218780463 is an equidigital number, since it uses as much as digits as its factorization.

1218780463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1218780463 is about 34911.0364068442. The cubic root of 1218780463 is about 1068.1735700427.

The spelling of 1218780463 in words is "one billion, two hundred eighteen million, seven hundred eighty thousand, four hundred sixty-three".