648553 has 4 divisors (see below), whose sum is σ = 662400. Its totient is φ = 634708.

The previous prime is 648509. The next prime is 648563. The reversal of 648553 is 355846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 648553 - 2⁹ = 648041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648563) 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, 6853 + ... + 6946.

It is an arithmetic number, because the mean of its divisors is an integer number (165600).

2⁶⁴⁸⁵⁵³ is an apocalyptic number.

It is an amenable number.

648553 is a deficient number, since it is larger than the sum of its proper divisors (13847).

648553 is a wasteful number, since it uses less digits than its factorization.

648553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13846.

The product of its digits is 14400, while the sum is 31.

The square root of 648553 is about 805.3278835356. The cubic root of 648553 is about 86.5595833925.

The spelling of 648553 in words is "six hundred forty-eight thousand, five hundred fifty-three".