871386071 has 2 divisors, whose sum is σ = 871386072. Its totient is φ = 871386070.

The previous prime is 871386029. The next prime is 871386107. The reversal of 871386071 is 170683178.

Together with next prime (871386107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871386071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871386011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435693035 + 435693036.

It is an arithmetic number, because the mean of its divisors is an integer number (435693036).

Almost surely, 2^871386071 is an apocalyptic number.

871386071 is a deficient number, since it is larger than the sum of its proper divisors (1).

871386071 is an equidigital number, since it uses as much as digits as its factorization.

871386071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 871386071 is about 29519.2491605054. The cubic root of 871386071 is about 955.1469748118.

The spelling of 871386071 in words is "eight hundred seventy-one million, three hundred eighty-six thousand, seventy-one".