871213831 has 2 divisors, whose sum is σ = 871213832. Its totient is φ = 871213830.

The previous prime is 871213813. The next prime is 871213867. The reversal of 871213831 is 138312178.

Together with previous prime (871213813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 871213831 - 2⁵ = 871213799 is a prime.

It is a super-2 number, since 2×871213831² = 1518027078651393122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (371213831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435606915 + 435606916.

It is an arithmetic number, because the mean of its divisors is an integer number (435606916).

Almost surely, 2^871213831 is an apocalyptic number.

871213831 is a deficient number, since it is larger than the sum of its proper divisors (1).

871213831 is an equidigital number, since it uses as much as digits as its factorization.

871213831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 871213831 is about 29516.3315979476. The cubic root of 871213831 is about 955.0840385462.

The spelling of 871213831 in words is "eight hundred seventy-one million, two hundred thirteen thousand, eight hundred thirty-one".