6471999 has 12 divisors (see below), whose sum is σ = 9488856. Its totient is φ = 4249872.

The previous prime is 6471977. The next prime is 6472007. The reversal of 6471999 is 9991746.

It is not a de Polignac number, because 6471999 - 2⁵ = 6471967 is a prime.

6471999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6471919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4764 + ... + 5969.

It is an arithmetic number, because the mean of its divisors is an integer number (790738).

Almost surely, 2^6471999 is an apocalyptic number.

6471999 is a deficient number, since it is larger than the sum of its proper divisors (3016857).

6471999 is a wasteful number, since it uses less digits than its factorization.

6471999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10806 (or 10803 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 6471999 is about 2544.0123820453. The cubic root of 6471999 is about 186.3571873744.

The spelling of 6471999 in words is "six million, four hundred seventy-one thousand, nine hundred ninety-nine".