1318435687 has 2 divisors, whose sum is σ = 1318435688. Its totient is φ = 1318435686.

The previous prime is 1318435667. The next prime is 1318435717. The reversal of 1318435687 is 7865348131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318435687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318435627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659217843 + 659217844.

It is an arithmetic number, because the mean of its divisors is an integer number (659217844).

Almost surely, 2^1318435687 is an apocalyptic number.

1318435687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318435687 is an equidigital number, since it uses as much as digits as its factorization.

1318435687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 1318435687 is about 36310.2697180839. The cubic root of 1318435687 is about 1096.5278081758.

The spelling of 1318435687 in words is "one billion, three hundred eighteen million, four hundred thirty-five thousand, six hundred eighty-seven".