648983 has 4 divisors (see below), whose sum is σ = 683160. Its totient is φ = 614808.

The previous prime is 648971. The next prime is 648997. The reversal of 648983 is 389846.

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

It is a cyclic number.

It is not a de Polignac number, because 648983 - 2¹⁶ = 583447 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 (648953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17060 + ... + 17097.

It is an arithmetic number, because the mean of its divisors is an integer number (170790).

2⁶⁴⁸⁹⁸³ is an apocalyptic number.

648983 is a deficient number, since it is larger than the sum of its proper divisors (34177).

648983 is a wasteful number, since it uses less digits than its factorization.

648983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34176.

The product of its digits is 41472, while the sum is 38.

The square root of 648983 is about 805.5948113040. The cubic root of 648983 is about 86.5787092506.

The spelling of 648983 in words is "six hundred forty-eight thousand, nine hundred eighty-three".