855819479 has 2 divisors, whose sum is σ = 855819480. Its totient is φ = 855819478.

The previous prime is 855819473. The next prime is 855819499. The reversal of 855819479 is 974918558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855819479 - 2²⁴ = 839042263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855819473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427909739 + 427909740.

It is an arithmetic number, because the mean of its divisors is an integer number (427909740).

Almost surely, 2^855819479 is an apocalyptic number.

855819479 is a deficient number, since it is larger than the sum of its proper divisors (1).

855819479 is an equidigital number, since it uses as much as digits as its factorization.

855819479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 56.

The square root of 855819479 is about 29254.3924736098. The cubic root of 855819479 is about 949.4251292086.

The spelling of 855819479 in words is "eight hundred fifty-five million, eight hundred nineteen thousand, four hundred seventy-nine".