855613 has 4 divisors (see below), whose sum is σ = 933408. Its totient is φ = 777820.

The previous prime is 855607. The next prime is 855619. The reversal of 855613 is 316558.

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 an interprime number because it is at equal distance from previous prime (855607) and next prime (855619).

It is a cyclic number.

It is not a de Polignac number, because 855613 - 2⁵ = 855581 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 (855619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38881 + ... + 38902.

It is an arithmetic number, because the mean of its divisors is an integer number (233352).

2⁸⁵⁵⁶¹³ is an apocalyptic number.

It is an amenable number.

855613 is a deficient number, since it is larger than the sum of its proper divisors (77795).

855613 is a wasteful number, since it uses less digits than its factorization.

855613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77794.

The product of its digits is 3600, while the sum is 28.

The square root of 855613 is about 924.9935134908. The cubic root of 855613 is about 94.9348768822.

The spelling of 855613 in words is "eight hundred fifty-five thousand, six hundred thirteen".