871812027 has 6 divisors (see below), whose sum is σ = 1259284052. Its totient is φ = 581208012.

The previous prime is 871812023. The next prime is 871812077. The reversal of 871812027 is 720218178.

It is a happy number.

It is not a de Polignac number, because 871812027 - 2² = 871812023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 871811982 and 871812000.

It is not an unprimeable number, because it can be changed into a prime (871812023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48433993 + ... + 48434010.

Almost surely, 2^871812027 is an apocalyptic number.

871812027 is a deficient number, since it is larger than the sum of its proper divisors (387472025).

871812027 is a wasteful number, since it uses less digits than its factorization.

871812027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96868009 (or 96868006 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 871812027 is about 29526.4631644225. The cubic root of 871812027 is about 955.3025829566.

The spelling of 871812027 in words is "eight hundred seventy-one million, eight hundred twelve thousand, twenty-seven".