1318371497 has 2 divisors, whose sum is σ = 1318371498. Its totient is φ = 1318371496.

The previous prime is 1318371463. The next prime is 1318371499. The reversal of 1318371497 is 7941738131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1239321616 + 79049881 = 35204^2 + 8891^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318371497 - 2¹⁴ = 1318355113 is a prime.

Together with 1318371499, 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 (1318371499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659185748 + 659185749.

It is an arithmetic number, because the mean of its divisors is an integer number (659185749).

Almost surely, 2^1318371497 is an apocalyptic number.

It is an amenable number.

1318371497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318371497 is an equidigital number, since it uses as much as digits as its factorization.

1318371497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 1318371497 is about 36309.3857976144. The cubic root of 1318371497 is about 1096.5100125252.

The spelling of 1318371497 in words is "one billion, three hundred eighteen million, three hundred seventy-one thousand, four hundred ninety-seven".