648089 has 4 divisors (see below), whose sum is σ = 697956. Its totient is φ = 598224.

The previous prime is 648079. The next prime is 648097. The reversal of 648089 is 980846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100489 + 547600 = 317^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 648089 - 2⁴ = 648073 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648089.

It is not an unprimeable number, because it can be changed into a prime (648019) 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 3 ways as a sum of consecutive naturals, for example, 24914 + ... + 24939.

It is an arithmetic number, because the mean of its divisors is an integer number (174489).

2⁶⁴⁸⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

648089 is a deficient number, since it is larger than the sum of its proper divisors (49867).

648089 is a wasteful number, since it uses less digits than its factorization.

648089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49866.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 648089 is about 805.0397505714. The cubic root of 648089 is about 86.5389357720.

The spelling of 648089 in words is "six hundred forty-eight thousand, eighty-nine".