6810491 has 4 divisors (see below), whose sum is σ = 6850032. Its totient is φ = 6770952.

The previous prime is 6810481. The next prime is 6810497. The reversal of 6810491 is 1940186.

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 6810491 - 2¹⁴ = 6794107 is a prime.

It is a super-2 number, since 2×6810491² = 92765575322162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6810497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19511 + ... + 19856.

It is an arithmetic number, because the mean of its divisors is an integer number (1712508).

Almost surely, 2^6810491 is an apocalyptic number.

6810491 is a deficient number, since it is larger than the sum of its proper divisors (39541).

6810491 is a wasteful number, since it uses less digits than its factorization.

6810491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39540.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 6810491 is about 2609.6917442487. The cubic root of 6810491 is about 189.5510266999.

The spelling of 6810491 in words is "six million, eight hundred ten thousand, four hundred ninety-one".