6499647 has 48 divisors (see below), whose sum is σ = 11950848. Its totient is φ = 3306240.

The previous prime is 6499637. The next prime is 6499651. The reversal of 6499647 is 7469946.

It is not a de Polignac number, because 6499647 - 2⁴ = 6499631 is a prime.

It is a super-2 number, since 2×6499647² = 84490822249218, which contains 22 as substring.

6499647 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499637) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57463 + ... + 57575.

It is an arithmetic number, because the mean of its divisors is an integer number (248976).

Almost surely, 2^6499647 is an apocalyptic number.

6499647 is a deficient number, since it is larger than the sum of its proper divisors (5451201).

6499647 is a wasteful number, since it uses less digits than its factorization.

6499647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 217 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 6499647 is about 2549.4405268607. The cubic root of 6499647 is about 186.6221793786.

Subtracting 6499647 from its reverse (7469946), we obtain a cube (970299 = 99³).

It can be divided in two parts, 649 and 9647, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 6499647 in words is "six million, four hundred ninety-nine thousand, six hundred forty-seven".