855313 has 4 divisors (see below), whose sum is σ = 875248. Its totient is φ = 835380.

The previous prime is 855311. The next prime is 855317. The reversal of 855313 is 313558.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 855313 - 2¹ = 855311 is a prime.

It is a Duffinian number.

855313 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (855311) 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, 9903 + ... + 9988.

It is an arithmetic number, because the mean of its divisors is an integer number (218812).

2⁸⁵⁵³¹³ is an apocalyptic number.

It is an amenable number.

855313 is a deficient number, since it is larger than the sum of its proper divisors (19935).

855313 is a wasteful number, since it uses less digits than its factorization.

855313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19934.

The product of its digits is 1800, while the sum is 25.

The square root of 855313 is about 924.8313359743. The cubic root of 855313 is about 94.9237800458.

The spelling of 855313 in words is "eight hundred fifty-five thousand, three hundred thirteen".