1397271313 has 2 divisors, whose sum is σ = 1397271314. Its totient is φ = 1397271312.

The previous prime is 1397271299. The next prime is 1397271331. The reversal of 1397271313 is 3131727931.

Together with next prime (1397271331) 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., 1078005889 + 319265424 = 32833^2 + 17868^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397271313 - 2⁹ = 1397270801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397271353) 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, 698635656 + 698635657.

It is an arithmetic number, because the mean of its divisors is an integer number (698635657).

Almost surely, 2^1397271313 is an apocalyptic number.

It is an amenable number.

1397271313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397271313 is an equidigital number, since it uses as much as digits as its factorization.

1397271313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 37.

The square root of 1397271313 is about 37380.0924691205. The cubic root of 1397271313 is about 1117.9616712890.

The spelling of 1397271313 in words is "one billion, three hundred ninety-seven million, two hundred seventy-one thousand, three hundred thirteen".