1218016871 has 2 divisors, whose sum is σ = 1218016872. Its totient is φ = 1218016870.

The previous prime is 1218016853. The next prime is 1218016897. The reversal of 1218016871 is 1786108121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218016871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218016841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609008435 + 609008436.

It is an arithmetic number, because the mean of its divisors is an integer number (609008436).

Almost surely, 2^1218016871 is an apocalyptic number.

1218016871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218016871 is an equidigital number, since it uses as much as digits as its factorization.

1218016871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 35.

The square root of 1218016871 is about 34900.0984382566. The cubic root of 1218016871 is about 1067.9504455842.

The spelling of 1218016871 in words is "one billion, two hundred eighteen million, sixteen thousand, eight hundred seventy-one".