1313127797 has 2 divisors, whose sum is σ = 1313127798. Its totient is φ = 1313127796.

The previous prime is 1313127773. The next prime is 1313127899. The reversal of 1313127797 is 7977213131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1035938596 + 277189201 = 32186^2 + 16649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313127797 - 2²⁰ = 1312079221 is a prime.

It is a super-2 number, since 2×1313127797² = 3448609222508146418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313127737) 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, 656563898 + 656563899.

It is an arithmetic number, because the mean of its divisors is an integer number (656563899).

Almost surely, 2^1313127797 is an apocalyptic number.

It is an amenable number.

1313127797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313127797 is an equidigital number, since it uses as much as digits as its factorization.

1313127797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55566, while the sum is 41.

The square root of 1313127797 is about 36237.1052513856. The cubic root of 1313127797 is about 1095.0543253352.

The spelling of 1313127797 in words is "one billion, three hundred thirteen million, one hundred twenty-seven thousand, seven hundred ninety-seven".