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213893 = 1071999
BaseRepresentation
bin110100001110000101
3101212101222
4310032011
523321033
64330125
71550411
oct641605
9355358
10213893
11136779
12a3945
1376484
1457d41
1543598
hex34385

213893 has 4 divisors (see below), whose sum is σ = 216000. Its totient is φ = 211788.

The previous prime is 213887. The next prime is 213901. The reversal of 213893 is 398312.

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 213893 - 28 = 213637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213833) 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, 893 + ... + 1106.

It is an arithmetic number, because the mean of its divisors is an integer number (54000).

2213893 is an apocalyptic number.

It is an amenable number.

213893 is a deficient number, since it is larger than the sum of its proper divisors (2107).

213893 is a wasteful number, since it uses less digits than its factorization.

213893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106.

The product of its digits is 1296, while the sum is 26.

The square root of 213893 is about 462.4856754538. The cubic root of 213893 is about 59.8042695952.

The spelling of 213893 in words is "two hundred thirteen thousand, eight hundred ninety-three".

Divisors: 1 107 1999 213893