648899 has 8 divisors (see below), whose sum is σ = 686880. Its totient is φ = 611776.

The previous prime is 648889. The next prime is 648911. The reversal of 648899 is 998846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648859) 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 7 ways as a sum of consecutive naturals, for example, 1889 + ... + 2205.

It is an arithmetic number, because the mean of its divisors is an integer number (85860).

2⁶⁴⁸⁸⁹⁹ is an apocalyptic number.

648899 is a deficient number, since it is larger than the sum of its proper divisors (37981).

648899 is a wasteful number, since it uses less digits than its factorization.

648899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429.

The product of its digits is 124416, while the sum is 44.

The square root of 648899 is about 805.5426742265. The cubic root of 648899 is about 86.5749737006.

The spelling of 648899 in words is "six hundred forty-eight thousand, eight hundred ninety-nine".