1316947987 has 2 divisors, whose sum is σ = 1316947988. Its totient is φ = 1316947986.

The previous prime is 1316947967. The next prime is 1316947997. The reversal of 1316947987 is 7897496131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1316947987 - 2¹¹ = 1316945939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1316947937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658473993 + 658473994.

It is an arithmetic number, because the mean of its divisors is an integer number (658473994).

Almost surely, 2^1316947987 is an apocalyptic number.

1316947987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316947987 is an equidigital number, since it uses as much as digits as its factorization.

1316947987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 55.

The square root of 1316947987 is about 36289.7779960142. Note that the first 3 decimals coincide. The cubic root of 1316947987 is about 1096.1152186199.

The spelling of 1316947987 in words is "one billion, three hundred sixteen million, nine hundred forty-seven thousand, nine hundred eighty-seven".