1316331917 has 2 divisors, whose sum is σ = 1316331918. Its totient is φ = 1316331916.

The previous prime is 1316331893. The next prime is 1316332037. The reversal of 1316331917 is 7191336131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085109481 + 231222436 = 32941^2 + 15206^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316331917 - 2²⁴ = 1299554701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1316351917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658165958 + 658165959.

It is an arithmetic number, because the mean of its divisors is an integer number (658165959).

Almost surely, 2^1316331917 is an apocalyptic number.

It is an amenable number.

1316331917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316331917 is an equidigital number, since it uses as much as digits as its factorization.

1316331917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 1316331917 is about 36281.2888001515. The cubic root of 1316331917 is about 1095.9442705804.

The spelling of 1316331917 in words is "one billion, three hundred sixteen million, three hundred thirty-one thousand, nine hundred seventeen".