871351931 has 2 divisors, whose sum is σ = 871351932. Its totient is φ = 871351930.

The previous prime is 871351903. The next prime is 871351933. The reversal of 871351931 is 139153178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 871351931 - 2⁶ = 871351867 is a prime.

It is a super-2 number, since 2×871351931² = 1518508375314857522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 871351933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (871351933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435675965 + 435675966.

It is an arithmetic number, because the mean of its divisors is an integer number (435675966).

Almost surely, 2^871351931 is an apocalyptic number.

871351931 is a deficient number, since it is larger than the sum of its proper divisors (1).

871351931 is an equidigital number, since it uses as much as digits as its factorization.

871351931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 871351931 is about 29518.6708881006. The cubic root of 871351931 is about 955.1345007605.

The spelling of 871351931 in words is "eight hundred seventy-one million, three hundred fifty-one thousand, nine hundred thirty-one".