867573780497 has 2 divisors, whose sum is σ = 867573780498. Its totient is φ = 867573780496.

The previous prime is 867573780457. The next prime is 867573780503. The reversal of 867573780497 is 794087375768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 827315765761 + 40258014736 = 909569^2 + 200644^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-867573780497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 867573780497.

It is not a weakly prime, because it can be changed into another prime (867573780457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433786890248 + 433786890249.

It is an arithmetic number, because the mean of its divisors is an integer number (433786890249).

Almost surely, 2^867573780497 is an apocalyptic number.

It is an amenable number.

867573780497 is a deficient number, since it is larger than the sum of its proper divisors (1).

867573780497 is an equidigital number, since it uses as much as digits as its factorization.

867573780497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497871360, while the sum is 71.

The spelling of 867573780497 in words is "eight hundred sixty-seven billion, five hundred seventy-three million, seven hundred eighty thousand, four hundred ninety-seven".