1297791793 has 2 divisors, whose sum is σ = 1297791794. Its totient is φ = 1297791792.

The previous prime is 1297791787. The next prime is 1297791797. The reversal of 1297791793 is 3971977921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 767733264 + 530058529 = 27708^2 + 23023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297791793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1297791797) 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, 648895896 + 648895897.

It is an arithmetic number, because the mean of its divisors is an integer number (648895897).

Almost surely, 2^1297791793 is an apocalyptic number.

It is an amenable number.

1297791793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297791793 is an equidigital number, since it uses as much as digits as its factorization.

1297791793 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1297791793 is about 36024.8774182508. The cubic root of 1297791793 is about 1090.7745786344.

The spelling of 1297791793 in words is "one billion, two hundred ninety-seven million, seven hundred ninety-one thousand, seven hundred ninety-three".