1297793871 has 24 divisors (see below), whose sum is σ = 2058058704. Its totient is φ = 781522560.

The previous prime is 1297793867. The next prime is 1297793873. The reversal of 1297793871 is 1783977921.

It is not a de Polignac number, because 1297793871 - 2² = 1297793867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297793873) 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 in 23 ways as a sum of consecutive naturals, for example, 26206 + ... + 57291.

It is an arithmetic number, because the mean of its divisors is an integer number (85752446).

Almost surely, 2^1297793871 is an apocalyptic number.

1297793871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1297793871 is a deficient number, since it is larger than the sum of its proper divisors (760264833).

1297793871 is a wasteful number, since it uses less digits than its factorization.

1297793871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83671 (or 83668 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 1297793871 is about 36024.9062594200. The cubic root of 1297793871 is about 1090.7751608101.

The spelling of 1297793871 in words is "one billion, two hundred ninety-seven million, seven hundred ninety-three thousand, eight hundred seventy-one".