1297171797137 has 4 divisors (see below), whose sum is σ = 1373476020516. Its totient is φ = 1220867573760.

The previous prime is 1297171797113. The next prime is 1297171797149. The reversal of 1297171797137 is 7317971717921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1029009388801 + 268162408336 = 1014401^2 + 517844^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297171797137 - 2⁶ = 1297171797073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1297171797137.

It is not an unprimeable number, because it can be changed into a prime (1297171797107) 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 in 3 ways as a sum of consecutive naturals, for example, 38152111664 + ... + 38152111697.

It is an arithmetic number, because the mean of its divisors is an integer number (343369005129).

Almost surely, 2^{1297171797137} is an apocalyptic number.

1297171797137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1297171797137 is a deficient number, since it is larger than the sum of its proper divisors (76304223379).

1297171797137 is an equidigital number, since it uses as much as digits as its factorization.

1297171797137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76304223378.

The product of its digits is 8168202, while the sum is 62.

The spelling of 1297171797137 in words is "one trillion, two hundred ninety-seven billion, one hundred seventy-one million, seven hundred ninety-seven thousand, one hundred thirty-seven".