1297704887 has 2 divisors, whose sum is σ = 1297704888. Its totient is φ = 1297704886.

The previous prime is 1297704871. The next prime is 1297704907. The reversal of 1297704887 is 7884077921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1297704887 - 2⁴ = 1297704871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297706887) 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, 648852443 + 648852444.

It is an arithmetic number, because the mean of its divisors is an integer number (648852444).

Almost surely, 2^1297704887 is an apocalyptic number.

1297704887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297704887 is an equidigital number, since it uses as much as digits as its factorization.

1297704887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1580544, while the sum is 53.

The square root of 1297704887 is about 36023.6712038071. The cubic root of 1297704887 is about 1090.7502303601.

The spelling of 1297704887 in words is "one billion, two hundred ninety-seven million, seven hundred four thousand, eight hundred eighty-seven".