1316745691 has 2 divisors, whose sum is σ = 1316745692. Its totient is φ = 1316745690.

The previous prime is 1316745673. The next prime is 1316745697. The reversal of 1316745691 is 1965476131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1316745691 - 2²⁷ = 1182527963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1316745697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658372845 + 658372846.

It is an arithmetic number, because the mean of its divisors is an integer number (658372846).

Almost surely, 2^1316745691 is an apocalyptic number.

1316745691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316745691 is an equidigital number, since it uses as much as digits as its factorization.

1316745691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 1316745691 is about 36286.9906578101. The cubic root of 1316745691 is about 1096.0590910985.

The spelling of 1316745691 in words is "one billion, three hundred sixteen million, seven hundred forty-five thousand, six hundred ninety-one".