648994 has 4 divisors (see below), whose sum is σ = 973494. Its totient is φ = 324496.

The previous prime is 648971. The next prime is 648997. The reversal of 648994 is 499846.

648994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499846 = 2 ⋅249923.

It can be written as a sum of positive squares in only one way, i.e., 508369 + 140625 = 713^2 + 375^2 .

It is not an unprimeable number, because it can be changed into a prime (648997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162247 + ... + 162250.

2⁶⁴⁸⁹⁹⁴ is an apocalyptic number.

648994 is a deficient number, since it is larger than the sum of its proper divisors (324500).

648994 is a wasteful number, since it uses less digits than its factorization.

648994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324499.

The product of its digits is 62208, while the sum is 40.

The square root of 648994 is about 805.6016385286. The cubic root of 648994 is about 86.5791984059.

The spelling of 648994 in words is "six hundred forty-eight thousand, nine hundred ninety-four".