6509898 has 24 divisors (see below), whose sum is σ = 14450436. Its totient is φ = 2116800.

The previous prime is 6509873. The next prime is 6509903. The reversal of 6509898 is 8989056.

It can be written as a sum of positive squares in 2 ways, for example, as 6215049 + 294849 = 2493^2 + 543^2 .

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3673 + ... + 5148.

Almost surely, 2^6509898 is an apocalyptic number.

6509898 is an abundant number, since it is smaller than the sum of its proper divisors (7940538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6509898 is a wasteful number, since it uses less digits than its factorization.

6509898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8870 (or 8867 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 6509898 is about 2551.4501758804. The cubic root of 6509898 is about 186.7202390170.

The spelling of 6509898 in words is "six million, five hundred nine thousand, eight hundred ninety-eight".