6817849 has 4 divisors (see below), whose sum is σ = 6984180. Its totient is φ = 6651520.

The previous prime is 6817843. The next prime is 6817859. The reversal of 6817849 is 9487186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9487186 = 2 ⋅4743593.

It can be written as a sum of positive squares in 2 ways, for example, as 1836025 + 4981824 = 1355^2 + 2232^2 .

It is a cyclic number.

It is not a de Polignac number, because 6817849 - 2¹⁵ = 6785081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6817843) 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, 83104 + ... + 83185.

It is an arithmetic number, because the mean of its divisors is an integer number (1746045).

Almost surely, 2^6817849 is an apocalyptic number.

It is an amenable number.

6817849 is a deficient number, since it is larger than the sum of its proper divisors (166331).

6817849 is a wasteful number, since it uses less digits than its factorization.

6817849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166330.

The product of its digits is 96768, while the sum is 43.

The square root of 6817849 is about 2611.1011087279. The cubic root of 6817849 is about 189.6192652687.

It can be divided in two parts, 6 and 817849, that multiplied together give a palindrome (4907094).

The spelling of 6817849 in words is "six million, eight hundred seventeen thousand, eight hundred forty-nine".