648887 has 2 divisors, whose sum is σ = 648888. Its totient is φ = 648886.

The previous prime is 648871. The next prime is 648889. The reversal of 648887 is 788846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648887 - 2⁴ = 648871 is a prime.

Together with 648889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324443 + 324444.

It is an arithmetic number, because the mean of its divisors is an integer number (324444).

2⁶⁴⁸⁸⁸⁷ is an apocalyptic number.

648887 is a deficient number, since it is larger than the sum of its proper divisors (1).

648887 is an equidigital number, since it uses as much as digits as its factorization.

648887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 41.

The square root of 648887 is about 805.5352257971. The cubic root of 648887 is about 86.5744400243.

Subtracting from 648887 its sum of digits (41), we obtain a palindrome (648846).

The spelling of 648887 in words is "six hundred forty-eight thousand, eight hundred eighty-seven".