855474457 has 2 divisors, whose sum is σ = 855474458. Its totient is φ = 855474456.

The previous prime is 855474377. The next prime is 855474467. The reversal of 855474457 is 754474558.

855474457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 844425481 + 11048976 = 29059^2 + 3324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855474457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855474457.

It is not a weakly prime, because it can be changed into another prime (855474467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427737228 + 427737229.

It is an arithmetic number, because the mean of its divisors is an integer number (427737229).

Almost surely, 2^855474457 is an apocalyptic number.

It is an amenable number.

855474457 is a deficient number, since it is larger than the sum of its proper divisors (1).

855474457 is an equidigital number, since it uses as much as digits as its factorization.

855474457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136000, while the sum is 49.

The square root of 855474457 is about 29248.4949527322. The cubic root of 855474457 is about 949.2975257459.

The spelling of 855474457 in words is "eight hundred fifty-five million, four hundred seventy-four thousand, four hundred fifty-seven".