1299317797 has 2 divisors, whose sum is σ = 1299317798. Its totient is φ = 1299317796.

The previous prime is 1299317783. The next prime is 1299317879. The reversal of 1299317797 is 7977139921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 921365316 + 377952481 = 30354^2 + 19441^2 .

It is an emirp because it is prime and its reverse (7977139921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1299317797 - 2¹¹ = 1299315749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1299317707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649658898 + 649658899.

It is an arithmetic number, because the mean of its divisors is an integer number (649658899).

Almost surely, 2^1299317797 is an apocalyptic number.

It is an amenable number.

1299317797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299317797 is an equidigital number, since it uses as much as digits as its factorization.

1299317797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1500282, while the sum is 55.

The square root of 1299317797 is about 36046.0510597208. The cubic root of 1299317797 is about 1091.2019390158.

The spelling of 1299317797 in words is "one billion, two hundred ninety-nine million, three hundred seventeen thousand, seven hundred ninety-seven".