855622879 has 2 divisors, whose sum is σ = 855622880. Its totient is φ = 855622878.

The previous prime is 855622871. The next prime is 855622961. The reversal of 855622879 is 978226558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855622879 - 2³ = 855622871 is a prime.

It is a super-2 number, since 2×855622879² = 1464181022136497282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855622871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427811439 + 427811440.

It is an arithmetic number, because the mean of its divisors is an integer number (427811440).

Almost surely, 2^855622879 is an apocalyptic number.

855622879 is a deficient number, since it is larger than the sum of its proper divisors (1).

855622879 is an equidigital number, since it uses as much as digits as its factorization.

855622879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 52.

The square root of 855622879 is about 29251.0321014490. The cubic root of 855622879 is about 949.3524225690.

The spelling of 855622879 in words is "eight hundred fifty-five million, six hundred twenty-two thousand, eight hundred seventy-nine".