856755479 has 2 divisors, whose sum is σ = 856755480. Its totient is φ = 856755478.

The previous prime is 856755457. The next prime is 856755539. The reversal of 856755479 is 974557658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856755479 - 2¹² = 856751383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856725479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428377739 + 428377740.

It is an arithmetic number, because the mean of its divisors is an integer number (428377740).

Almost surely, 2^856755479 is an apocalyptic number.

856755479 is a deficient number, since it is larger than the sum of its proper divisors (1).

856755479 is an equidigital number, since it uses as much as digits as its factorization.

856755479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584000, while the sum is 56.

The square root of 856755479 is about 29270.3856995428. The cubic root of 856755479 is about 949.7711282447.

It can be divided in two parts, 8567 and 55479, that added together give a palindrome (64046).

The spelling of 856755479 in words is "eight hundred fifty-six million, seven hundred fifty-five thousand, four hundred seventy-nine".