871897448869 has 2 divisors, whose sum is σ = 871897448870. Its totient is φ = 871897448868.

The previous prime is 871897448831. The next prime is 871897448911. The reversal of 871897448869 is 968844798178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 755705091969 + 116192356900 = 869313^2 + 340870^2 .

It is a cyclic number.

It is not a de Polignac number, because 871897448869 - 2³⁵ = 837537710501 is a prime.

It is a super-2 number, since 2×871897448869² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871897448969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435948724434 + 435948724435.

It is an arithmetic number, because the mean of its divisors is an integer number (435948724435).

Almost surely, 2^871897448869 is an apocalyptic number.

It is an amenable number.

871897448869 is a deficient number, since it is larger than the sum of its proper divisors (1).

871897448869 is an equidigital number, since it uses as much as digits as its factorization.

871897448869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1560674304, while the sum is 79.

The spelling of 871897448869 in words is "eight hundred seventy-one billion, eight hundred ninety-seven million, four hundred forty-eight thousand, eight hundred sixty-nine".