851842669 has 2 divisors, whose sum is σ = 851842670. Its totient is φ = 851842668.

The previous prime is 851842657. The next prime is 851842687. The reversal of 851842669 is 966248158.

851842669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 556346569 + 295496100 = 23587^2 + 17190^2 .

It is a cyclic number.

It is not a de Polignac number, because 851842669 - 2¹⁵ = 851809901 is a prime.

It is a super-2 number, since 2×851842669² = 1451271865458087122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851842639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425921334 + 425921335.

It is an arithmetic number, because the mean of its divisors is an integer number (425921335).

Almost surely, 2^851842669 is an apocalyptic number.

It is an amenable number.

851842669 is a deficient number, since it is larger than the sum of its proper divisors (1).

851842669 is an equidigital number, since it uses as much as digits as its factorization.

851842669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 49.

The square root of 851842669 is about 29186.3438786019. The cubic root of 851842669 is about 947.9522536588.

The spelling of 851842669 in words is "eight hundred fifty-one million, eight hundred forty-two thousand, six hundred sixty-nine".