845971671197 has 2 divisors, whose sum is σ = 845971671198. Its totient is φ = 845971671196.

The previous prime is 845971671179. The next prime is 845971671269. The reversal of 845971671197 is 791176179548.

Together with previous prime (845971671179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793059710521 + 52911960676 = 890539^2 + 230026^2 .

It is a cyclic number.

It is not a de Polignac number, because 845971671197 - 2⁶ = 845971671133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845971671137) 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, 422985835598 + 422985835599.

It is an arithmetic number, because the mean of its divisors is an integer number (422985835599).

Almost surely, 2^845971671197 is an apocalyptic number.

It is an amenable number.

845971671197 is a deficient number, since it is larger than the sum of its proper divisors (1).

845971671197 is an equidigital number, since it uses as much as digits as its factorization.

845971671197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 65.

The spelling of 845971671197 in words is "eight hundred forty-five billion, nine hundred seventy-one million, six hundred seventy-one thousand, one hundred ninety-seven".