851168069 has 2 divisors, whose sum is σ = 851168070. Its totient is φ = 851168068.

The previous prime is 851168057. The next prime is 851168083. The reversal of 851168069 is 960861158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 590733025 + 260435044 = 24305^2 + 16138^2 .

It is a cyclic number.

It is not a de Polignac number, because 851168069 - 2¹⁶ = 851102533 is a prime.

It is a super-2 number, since 2×851168069² = 1448974163370377522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851168089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425584034 + 425584035.

It is an arithmetic number, because the mean of its divisors is an integer number (425584035).

Almost surely, 2^851168069 is an apocalyptic number.

It is an amenable number.

851168069 is a deficient number, since it is larger than the sum of its proper divisors (1).

851168069 is an equidigital number, since it uses as much as digits as its factorization.

851168069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 851168069 is about 29174.7848149734. The cubic root of 851168069 is about 947.7019502096.

The spelling of 851168069 in words is "eight hundred fifty-one million, one hundred sixty-eight thousand, sixty-nine".