12787439571097 has 2 divisors, whose sum is σ = 12787439571098. Its totient is φ = 12787439571096.

The previous prime is 12787439570999. The next prime is 12787439571139. The reversal of 12787439571097 is 79017593478721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9538436926096 + 3249002645001 = 3088436^2 + 1802499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12787439571097 is a prime.

It is a super-2 number, since 2×12787439571097² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12787439571197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6393719785548 + 6393719785549.

It is an arithmetic number, because the mean of its divisors is an integer number (6393719785549).

Almost surely, 2^{12787439571097} is an apocalyptic number.

It is an amenable number.

12787439571097 is a deficient number, since it is larger than the sum of its proper divisors (1).

12787439571097 is an equidigital number, since it uses as much as digits as its factorization.

12787439571097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186701760, while the sum is 70.

The spelling of 12787439571097 in words is "twelve trillion, seven hundred eighty-seven billion, four hundred thirty-nine million, five hundred seventy-one thousand, ninety-seven".