1297305589 has 2 divisors, whose sum is σ = 1297305590. Its totient is φ = 1297305588.

The previous prime is 1297305587. The next prime is 1297305631. The reversal of 1297305589 is 9855037921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1137712900 + 159592689 = 33730^2 + 12633^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297305589 - 2¹ = 1297305587 is a prime.

Together with 1297305587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297305587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648652794 + 648652795.

It is an arithmetic number, because the mean of its divisors is an integer number (648652795).

Almost surely, 2^1297305589 is an apocalyptic number.

It is an amenable number.

1297305589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297305589 is an equidigital number, since it uses as much as digits as its factorization.

1297305589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 1297305589 is about 36018.1286160178. The cubic root of 1297305589 is about 1090.6383458919.

The spelling of 1297305589 in words is "one billion, two hundred ninety-seven million, three hundred five thousand, five hundred eighty-nine".