1218066193 has 16 divisors (see below), whose sum is σ = 1321142400. Its totient is φ = 1119381120.

The previous prime is 1218066173. The next prime is 1218066221. The reversal of 1218066193 is 3916608121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218066193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218066173) 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 in 15 ways as a sum of consecutive naturals, for example, 82828 + ... + 96418.

It is an arithmetic number, because the mean of its divisors is an integer number (82571400).

Almost surely, 2^1218066193 is an apocalyptic number.

It is an amenable number.

1218066193 is a deficient number, since it is larger than the sum of its proper divisors (103076207).

1218066193 is a wasteful number, since it uses less digits than its factorization.

1218066193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13752.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1218066193 is about 34900.8050480215. The cubic root of 1218066193 is about 1067.9648604751.

The spelling of 1218066193 in words is "one billion, two hundred eighteen million, sixty-six thousand, one hundred ninety-three".