1218144079 has 4 divisors (see below), whose sum is σ = 1218604176. Its totient is φ = 1217683984.

The previous prime is 1218144077. The next prime is 1218144121. The reversal of 1218144079 is 9704418121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9704418121 = 7757 ⋅1251053.

It is a cyclic number.

It is not a de Polignac number, because 1218144079 - 2¹ = 1218144077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218144077) 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 in 3 ways as a sum of consecutive naturals, for example, 226054 + ... + 231379.

It is an arithmetic number, because the mean of its divisors is an integer number (304651044).

Almost surely, 2^1218144079 is an apocalyptic number.

1218144079 is a deficient number, since it is larger than the sum of its proper divisors (460097).

1218144079 is an equidigital number, since it uses as much as digits as its factorization.

1218144079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460096.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1218144079 is about 34901.9208497183. The cubic root of 1218144079 is about 1067.9876227133.

The spelling of 1218144079 in words is "one billion, two hundred eighteen million, one hundred forty-four thousand, seventy-nine".