1318660787 has 2 divisors, whose sum is σ = 1318660788. Its totient is φ = 1318660786.

The previous prime is 1318660703. The next prime is 1318660789. The reversal of 1318660787 is 7870668131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1318660787 - 2¹⁶ = 1318595251 is a prime.

Together with 1318660789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1318660789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659330393 + 659330394.

It is an arithmetic number, because the mean of its divisors is an integer number (659330394).

Almost surely, 2^1318660787 is an apocalyptic number.

1318660787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318660787 is an equidigital number, since it uses as much as digits as its factorization.

1318660787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 1318660787 is about 36313.3692598194. The cubic root of 1318660787 is about 1096.5902089856.

The spelling of 1318660787 in words is "one billion, three hundred eighteen million, six hundred sixty thousand, seven hundred eighty-seven".