6447087 has 8 divisors (see below), whose sum is σ = 9551280. Its totient is φ = 4298040.

The previous prime is 6447073. The next prime is 6447109. The reversal of 6447087 is 7807446.

It is a happy number.

6447087 is a `hidden beast` number, since 644 + 7 + 0 + 8 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-6447087 is a prime.

6447087 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6447017) 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, 119364 + ... + 119417.

It is an arithmetic number, because the mean of its divisors is an integer number (1193910).

Almost surely, 2^6447087 is an apocalyptic number.

6447087 is a deficient number, since it is larger than the sum of its proper divisors (3104193).

6447087 is a wasteful number, since it uses less digits than its factorization.

6447087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238790 (or 238784 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 6447087 is about 2539.1114587588. Note that the first 3 decimals coincide. The cubic root of 6447087 is about 186.1177714076.

The spelling of 6447087 in words is "six million, four hundred forty-seven thousand, eighty-seven".