893991 has 8 divisors (see below), whose sum is σ = 1362304. Its totient is φ = 510840.

The previous prime is 893989. The next prime is 893999. The reversal of 893991 is 199398.

893991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 893991 - 2¹ = 893989 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 (893999) 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, 21265 + ... + 21306.

It is an arithmetic number, because the mean of its divisors is an integer number (170288).

2⁸⁹³⁹⁹¹ is an apocalyptic number.

893991 is a deficient number, since it is larger than the sum of its proper divisors (468313).

893991 is a wasteful number, since it uses less digits than its factorization.

893991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42581.

The product of its digits is 17496, while the sum is 39.

The square root of 893991 is about 945.5109729665. The cubic root of 893991 is about 96.3335834361. Note that the first 3 decimals are identical.

The spelling of 893991 in words is "eight hundred ninety-three thousand, nine hundred ninety-one".