871897448831 has 2 divisors, whose sum is σ = 871897448832. Its totient is φ = 871897448830.

The previous prime is 871897448797. The next prime is 871897448869. The reversal of 871897448831 is 138844798178.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 871897448831 - 2¹⁸ = 871897186687 is a prime.

It is a super-2 number, since 2×871897448831² (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 (871897448131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435948724415 + 435948724416.

It is an arithmetic number, because the mean of its divisors is an integer number (435948724416).

Almost surely, 2^871897448831 is an apocalyptic number.

871897448831 is a deficient number, since it is larger than the sum of its proper divisors (1).

871897448831 is an equidigital number, since it uses as much as digits as its factorization.

871897448831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86704128, while the sum is 68.

The spelling of 871897448831 in words is "eight hundred seventy-one billion, eight hundred ninety-seven million, four hundred forty-eight thousand, eight hundred thirty-one".