1297705393 has 2 divisors, whose sum is σ = 1297705394. Its totient is φ = 1297705392.

The previous prime is 1297705349. The next prime is 1297705417. The reversal of 1297705393 is 3935077921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1194946624 + 102758769 = 34568^2 + 10137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297705393 - 2²⁵ = 1264150961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1297705303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648852696 + 648852697.

It is an arithmetic number, because the mean of its divisors is an integer number (648852697).

Almost surely, 2^1297705393 is an apocalyptic number.

It is an amenable number.

1297705393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297705393 is an equidigital number, since it uses as much as digits as its factorization.

1297705393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 357210, while the sum is 46.

The square root of 1297705393 is about 36023.6782269662. The cubic root of 1297705393 is about 1090.7503721283.

The spelling of 1297705393 in words is "one billion, two hundred ninety-seven million, seven hundred five thousand, three hundred ninety-three".