6490839 has 4 divisors (see below), whose sum is σ = 8654456. Its totient is φ = 4327224.

The previous prime is 6490831. The next prime is 6490871. The reversal of 6490839 is 9380946.

6490839 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6490839 - 2³ = 6490831 is a prime.

It is a D-number.

It is a Duffinian number.

6490839 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6490797 and 6490806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6490831) 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, 1081804 + ... + 1081809.

It is an arithmetic number, because the mean of its divisors is an integer number (2163614).

Almost surely, 2^6490839 is an apocalyptic number.

6490839 is a deficient number, since it is larger than the sum of its proper divisors (2163617).

6490839 is a wasteful number, since it uses less digits than its factorization.

6490839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163616.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 6490839 is about 2547.7125034038. The cubic root of 6490839 is about 186.5378408890.

The spelling of 6490839 in words is "six million, four hundred ninety thousand, eight hundred thirty-nine".