6491939 has 4 divisors (see below), whose sum is σ = 6833640. Its totient is φ = 6150240.

The previous prime is 6491929. The next prime is 6491951. The reversal of 6491939 is 9391946.

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

It is a cyclic number.

It is not a de Polignac number, because 6491939 - 2⁴ = 6491923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6491896 and 6491905.

It is not an unprimeable number, because it can be changed into a prime (6491929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170822 + ... + 170859.

It is an arithmetic number, because the mean of its divisors is an integer number (1708410).

Almost surely, 2^6491939 is an apocalyptic number.

6491939 is a deficient number, since it is larger than the sum of its proper divisors (341701).

6491939 is a wasteful number, since it uses less digits than its factorization.

6491939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341700.

The product of its digits is 52488, while the sum is 41.

The square root of 6491939 is about 2547.9283741895. The cubic root of 6491939 is about 186.5483777926.

The spelling of 6491939 in words is "six million, four hundred ninety-one thousand, nine hundred thirty-nine".