855302813 has 4 divisors (see below), whose sum is σ = 855365148. Its totient is φ = 855240480.

The previous prime is 855302779. The next prime is 855302837. The reversal of 855302813 is 318203558.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 318203558 = 2 ⋅159101779.

It can be written as a sum of positive squares in 2 ways, for example, as 181225444 + 674077369 = 13462^2 + 25963^2 .

It is a cyclic number.

It is not a de Polignac number, because 855302813 - 2⁸ = 855302557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855302843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578 + ... + 41363.

It is an arithmetic number, because the mean of its divisors is an integer number (213841287).

Almost surely, 2^855302813 is an apocalyptic number.

It is an amenable number.

855302813 is a deficient number, since it is larger than the sum of its proper divisors (62335).

855302813 is a wasteful number, since it uses less digits than its factorization.

855302813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62334.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 855302813 is about 29245.5605690847. The cubic root of 855302813 is about 949.2340318870.

The spelling of 855302813 in words is "eight hundred fifty-five million, three hundred two thousand, eight hundred thirteen".