648403 has 8 divisors (see below), whose sum is σ = 746240. Its totient is φ = 551880.

The previous prime is 648391. The next prime is 648433. The reversal of 648403 is 304846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 648403 - 2⁵ = 648371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648433) 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 7 ways as a sum of consecutive naturals, for example, 1258 + ... + 1696.

It is an arithmetic number, because the mean of its divisors is an integer number (93280).

2⁶⁴⁸⁴⁰³ is an apocalyptic number.

648403 is a deficient number, since it is larger than the sum of its proper divisors (97837).

648403 is a wasteful number, since it uses less digits than its factorization.

648403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 648403 is about 805.2347483809. The cubic root of 648403 is about 86.5529095928.

The spelling of 648403 in words is "six hundred forty-eight thousand, four hundred three".