6409971 has 6 divisors (see below), whose sum is σ = 9258860. Its totient is φ = 4273308.

The previous prime is 6409943. The next prime is 6410009. The reversal of 6409971 is 1799046.

6409971 is a `hidden beast` number, since 640 + 9 + 9 + 7 + 1 = 666.

It is not a de Polignac number, because 6409971 - 2¹¹ = 6407923 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (6409471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356101 + ... + 356118.

Almost surely, 2^6409971 is an apocalyptic number.

6409971 is a deficient number, since it is larger than the sum of its proper divisors (2848889).

6409971 is a wasteful number, since it uses less digits than its factorization.

6409971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712225 (or 712222 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 6409971 is about 2531.7920530723. The cubic root of 6409971 is about 185.7599226531.

The spelling of 6409971 in words is "six million, four hundred nine thousand, nine hundred seventy-one".