855000071 has 2 divisors, whose sum is σ = 855000072. Its totient is φ = 855000070.

The previous prime is 855000067. The next prime is 855000079. The reversal of 855000071 is 170000558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855000071 - 2² = 855000067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855000071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855000079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427500035 + 427500036.

It is an arithmetic number, because the mean of its divisors is an integer number (427500036).

Almost surely, 2^855000071 is an apocalyptic number.

855000071 is a deficient number, since it is larger than the sum of its proper divisors (1).

855000071 is an equidigital number, since it uses as much as digits as its factorization.

855000071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 855000071 is about 29240.3842485012. The cubic root of 855000071 is about 949.1220220749.

The spelling of 855000071 in words is "eight hundred fifty-five million, seventy-one", and thus it is an aban number.