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6830891 = 13215171
BaseRepresentation
bin11010000011101100101011
3110212001012222
4122003230223
53222042031
6402224255
7112030064
oct32035453
913761188
106830891
113946171
12235508b
131552262
14c9b56b
158ede7b
hex683b2b

6830891 has 4 divisors (see below), whose sum is σ = 6837384. Its totient is φ = 6824400.

The previous prime is 6830869. The next prime is 6830897. The reversal of 6830891 is 1980386.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-6830891 is a prime.

It is a super-2 number, since 2×68308912 = 93322143707762, which contains 22 as substring.

It is a deceptive number, since it divides R6830890.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6830897) 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, 1265 + ... + 3906.

It is an arithmetic number, because the mean of its divisors is an integer number (1709346).

Almost surely, 26830891 is an apocalyptic number.

6830891 is a deficient number, since it is larger than the sum of its proper divisors (6493).

6830891 is a wasteful number, since it uses less digits than its factorization.

6830891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 6830891 is about 2613.5973293528. The cubic root of 6830891 is about 189.7400970852.

The spelling of 6830891 in words is "six million, eight hundred thirty thousand, eight hundred ninety-one".

Divisors: 1 1321 5171 6830891