1297993 has 2 divisors, whose sum is σ = 1297994. Its totient is φ = 1297992.

The previous prime is 1297979. The next prime is 1298027. The reversal of 1297993 is 3997921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1261129 + 36864 = 1123^2 + 192^2 .

It is an emirp because it is prime and its reverse (3997921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1297993 - 2¹³ = 1289801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1297963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648996 + 648997.

It is an arithmetic number, because the mean of its divisors is an integer number (648997).

2^1297993 is an apocalyptic number.

It is an amenable number.

1297993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297993 is an equidigital number, since it uses as much as digits as its factorization.

1297993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 40.

The square root of 1297993 is about 1139.2949574188. The cubic root of 1297993 is about 109.0830946212.

The spelling of 1297993 in words is "one million, two hundred ninety-seven thousand, nine hundred ninety-three".