855208313 has 2 divisors, whose sum is σ = 855208314. Its totient is φ = 855208312.

The previous prime is 855208267. The next prime is 855208327. The reversal of 855208313 is 313802558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472105984 + 383102329 = 21728^2 + 19573^2 .

It is a cyclic number.

It is not a de Polignac number, because 855208313 - 2¹⁰ = 855207289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (855208513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427604156 + 427604157.

It is an arithmetic number, because the mean of its divisors is an integer number (427604157).

Almost surely, 2^855208313 is an apocalyptic number.

It is an amenable number.

855208313 is a deficient number, since it is larger than the sum of its proper divisors (1).

855208313 is an equidigital number, since it uses as much as digits as its factorization.

855208313 is an evil number, because the sum of its binary digits is even.

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

The square root of 855208313 is about 29243.9448946273. The cubic root of 855208313 is about 949.1990712007.

The spelling of 855208313 in words is "eight hundred fifty-five million, two hundred eight thousand, three hundred thirteen".