855059771 has 2 divisors, whose sum is σ = 855059772. Its totient is φ = 855059770.

The previous prime is 855059743. The next prime is 855059851. The reversal of 855059771 is 177950558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855059771 is a prime.

It is a super-2 number, since 2×855059771² = 1462254423965144882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (855059371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427529885 + 427529886.

It is an arithmetic number, because the mean of its divisors is an integer number (427529886).

Almost surely, 2^855059771 is an apocalyptic number.

855059771 is a deficient number, since it is larger than the sum of its proper divisors (1).

855059771 is an equidigital number, since it uses as much as digits as its factorization.

855059771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 441000, while the sum is 47.

The square root of 855059771 is about 29241.4050790997. The cubic root of 855059771 is about 949.1441122353.

The spelling of 855059771 in words is "eight hundred fifty-five million, fifty-nine thousand, seven hundred seventy-one".