6478191 has 8 divisors (see below), whose sum is σ = 9597360. Its totient is φ = 4318776.

The previous prime is 6478187. The next prime is 6478193. The reversal of 6478191 is 1918746.

6478191 is a `hidden beast` number, since 647 + 8 + 1 + 9 + 1 = 666.

It is not a de Polignac number, because 6478191 - 2² = 6478187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119940 + ... + 119993.

It is an arithmetic number, because the mean of its divisors is an integer number (1199670).

Almost surely, 2^6478191 is an apocalyptic number.

6478191 is a deficient number, since it is larger than the sum of its proper divisors (3119169).

6478191 is a wasteful number, since it uses less digits than its factorization.

6478191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239942 (or 239936 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 6478191 is about 2545.2290663121. The cubic root of 6478191 is about 186.4166000278.

The spelling of 6478191 in words is "six million, four hundred seventy-eight thousand, one hundred ninety-one".