425985527387197 has 2 divisors, whose sum is σ = 425985527387198. Its totient is φ = 425985527387196.

The previous prime is 425985527387111. The next prime is 425985527387201. The reversal of 425985527387197 is 791783725589524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386717495237956 + 39268032149241 = 19665134^2 + 6266421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425985527387197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 425985527387197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425985527397197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212992763693598 + 212992763693599.

It is an arithmetic number, because the mean of its divisors is an integer number (212992763693599).

Almost surely, 2^{425985527387197} is an apocalyptic number.

It is an amenable number.

425985527387197 is a deficient number, since it is larger than the sum of its proper divisors (1).

425985527387197 is an equidigital number, since it uses as much as digits as its factorization.

425985527387197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672000, while the sum is 82.

The spelling of 425985527387197 in words is "four hundred twenty-five trillion, nine hundred eighty-five billion, five hundred twenty-seven million, three hundred eighty-seven thousand, one hundred ninety-seven".