1316656571 has 2 divisors, whose sum is σ = 1316656572. Its totient is φ = 1316656570.

The previous prime is 1316656559. The next prime is 1316656573. The reversal of 1316656571 is 1756566131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1316656571 - 2¹⁸ = 1316394427 is a prime.

It is a Sophie Germain prime.

Together with 1316656573, 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 (1316656573) 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, 658328285 + 658328286.

It is an arithmetic number, because the mean of its divisors is an integer number (658328286).

Almost surely, 2^1316656571 is an apocalyptic number.

1316656571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316656571 is an equidigital number, since it uses as much as digits as its factorization.

1316656571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 1316656571 is about 36285.7626487304. The cubic root of 1316656571 is about 1096.0343627118.

The spelling of 1316656571 in words is "one billion, three hundred sixteen million, six hundred fifty-six thousand, five hundred seventy-one".