1218270047 has 2 divisors, whose sum is σ = 1218270048. Its totient is φ = 1218270046.

The previous prime is 1218269999. The next prime is 1218270061. The reversal of 1218270047 is 7400728121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7400728121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1218270047 - 2⁸ = 1218269791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1218269995 and 1218270022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218270247) 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, 609135023 + 609135024.

It is an arithmetic number, because the mean of its divisors is an integer number (609135024).

Almost surely, 2^1218270047 is an apocalyptic number.

1218270047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218270047 is an equidigital number, since it uses as much as digits as its factorization.

1218270047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 1218270047 is about 34903.7254028850. The cubic root of 1218270047 is about 1068.0244348962.

Adding to 1218270047 its reverse (7400728121), we get a palindrome (8618998168).

The spelling of 1218270047 in words is "one billion, two hundred eighteen million, two hundred seventy thousand, forty-seven".