855993 has 8 divisors (see below), whose sum is σ = 1180800. Its totient is φ = 550928.

The previous prime is 855989. The next prime is 855997. The reversal of 855993 is 399558.

It is an interprime number because it is at equal distance from previous prime (855989) and next prime (855997).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 855993 - 2² = 855989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4833 + ... + 5006.

It is an arithmetic number, because the mean of its divisors is an integer number (147600).

2⁸⁵⁵⁹⁹³ is an apocalyptic number.

It is an amenable number.

855993 is a deficient number, since it is larger than the sum of its proper divisors (324807).

855993 is a wasteful number, since it uses less digits than its factorization.

855993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9871.

The product of its digits is 48600, while the sum is 39.

The square root of 855993 is about 925.1988975350. The cubic root of 855993 is about 94.9489291519.

The spelling of 855993 in words is "eight hundred fifty-five thousand, nine hundred ninety-three".