851028071 has 2 divisors, whose sum is σ = 851028072. Its totient is φ = 851028070.

The previous prime is 851028067. The next prime is 851028091. The reversal of 851028071 is 170820158.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 851028071 - 2² = 851028067 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851028091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425514035 + 425514036.

It is an arithmetic number, because the mean of its divisors is an integer number (425514036).

Almost surely, 2^851028071 is an apocalyptic number.

851028071 is a deficient number, since it is larger than the sum of its proper divisors (1).

851028071 is an equidigital number, since it uses as much as digits as its factorization.

851028071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 851028071 is about 29172.3854184055. The cubic root of 851028071 is about 947.6499888100.

The spelling of 851028071 in words is "eight hundred fifty-one million, twenty-eight thousand, seventy-one".