6478091 has 4 divisors (see below), whose sum is σ = 6484632. Its totient is φ = 6471552.

The previous prime is 6478061. The next prime is 6478103. The reversal of 6478091 is 1908746.

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 not a de Polignac number, because 6478091 - 2⁶ = 6478027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6478061) 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, 1445 + ... + 3878.

It is an arithmetic number, because the mean of its divisors is an integer number (1621158).

Almost surely, 2^6478091 is an apocalyptic number.

6478091 is a deficient number, since it is larger than the sum of its proper divisors (6541).

6478091 is a wasteful number, since it uses less digits than its factorization.

6478091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 6478091 is about 2545.2094216390. The cubic root of 6478091 is about 186.4156408219.

The spelling of 6478091 in words is "six million, four hundred seventy-eight thousand, ninety-one".