648109 has 16 divisors (see below), whose sum is σ = 852480. Its totient is φ = 477360.

The previous prime is 648107. The next prime is 648119. The reversal of 648109 is 901846.

It is a cyclic number.

It is not a de Polignac number, because 648109 - 2¹ = 648107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242 + ... + 1684.

It is an arithmetic number, because the mean of its divisors is an integer number (53280).

2⁶⁴⁸¹⁰⁹ is an apocalyptic number.

It is an amenable number.

648109 is a deficient number, since it is larger than the sum of its proper divisors (204371).

648109 is a wasteful number, since it uses less digits than its factorization.

648109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 648109 is about 805.0521722224. The cubic root of 648109 is about 86.5398259589.

It can be divided in two parts, 648 and 109, that added together give a palindrome (757).

The spelling of 648109 in words is "six hundred forty-eight thousand, one hundred nine".