1218796199 has 2 divisors, whose sum is σ = 1218796200. Its totient is φ = 1218796198.

The previous prime is 1218796177. The next prime is 1218796223. The reversal of 1218796199 is 9916978121.

It is a weak prime.

It is an emirp because it is prime and its reverse (9916978121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1218796199 - 2²⁸ = 950360743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1218796199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218796499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609398099 + 609398100.

It is an arithmetic number, because the mean of its divisors is an integer number (609398100).

Almost surely, 2^1218796199 is an apocalyptic number.

1218796199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218796199 is an equidigital number, since it uses as much as digits as its factorization.

1218796199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 53.

The square root of 1218796199 is about 34911.2617789733. The cubic root of 1218796199 is about 1068.1781671810.

The spelling of 1218796199 in words is "one billion, two hundred eighteen million, seven hundred ninety-six thousand, one hundred ninety-nine".