6634509 has 16 divisors (see below), whose sum is σ = 10217088. Its totient is φ = 3750912.

The previous prime is 6634469. The next prime is 6634517. The reversal of 6634509 is 9054366.

It is a happy number.

It is not a de Polignac number, because 6634509 - 2¹⁶ = 6568973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6634509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6634549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409 + ... + 3665.

It is an arithmetic number, because the mean of its divisors is an integer number (638568).

Almost surely, 2^6634509 is an apocalyptic number.

It is an amenable number.

6634509 is a deficient number, since it is larger than the sum of its proper divisors (3582579).

6634509 is a wasteful number, since it uses less digits than its factorization.

6634509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 6634509 is about 2575.7540643470. The cubic root of 6634509 is about 187.9041026687.

The spelling of 6634509 in words is "six million, six hundred thirty-four thousand, five hundred nine".