648487 has 4 divisors (see below), whose sum is σ = 741136. Its totient is φ = 555840.

The previous prime is 648481. The next prime is 648509. The reversal of 648487 is 784846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784846 = 2 ⋅392423.

It is a cyclic number.

It is not a de Polignac number, because 648487 - 2¹⁹ = 124199 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 (648481) 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, 46314 + ... + 46327.

It is an arithmetic number, because the mean of its divisors is an integer number (185284).

2⁶⁴⁸⁴⁸⁷ is an apocalyptic number.

648487 is a deficient number, since it is larger than the sum of its proper divisors (92649).

648487 is an equidigital number, since it uses as much as digits as its factorization.

648487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92648.

The product of its digits is 43008, while the sum is 37.

The square root of 648487 is about 805.2869053946. The cubic root of 648487 is about 86.5566470474.

The spelling of 648487 in words is "six hundred forty-eight thousand, four hundred eighty-seven".