1316508397 has 2 divisors, whose sum is σ = 1316508398. Its totient is φ = 1316508396.

The previous prime is 1316508379. The next prime is 1316508443. The reversal of 1316508397 is 7938056131.

Together with previous prime (1316508379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1163219236 + 153289161 = 34106^2 + 12381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1316508397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1316508307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658254198 + 658254199.

It is an arithmetic number, because the mean of its divisors is an integer number (658254199).

Almost surely, 2^1316508397 is an apocalyptic number.

It is an amenable number.

1316508397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316508397 is an equidigital number, since it uses as much as digits as its factorization.

1316508397 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1316508397 is about 36283.7208262879. The cubic root of 1316508397 is about 1095.9932459691.

The spelling of 1316508397 in words is "one billion, three hundred sixteen million, five hundred eight thousand, three hundred ninety-seven".