648693 has 6 divisors (see below), whose sum is σ = 937014. Its totient is φ = 432456.

The previous prime is 648689. The next prime is 648709. The reversal of 648693 is 396846.

648693 is a `hidden beast` number, since 648 + 6 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 400689 + 248004 = 633^2 + 498^2 .

It is not a de Polignac number, because 648693 - 2² = 648689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648653) 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 in 5 ways as a sum of consecutive naturals, for example, 36030 + ... + 36047.

It is an arithmetic number, because the mean of its divisors is an integer number (156169).

2⁶⁴⁸⁶⁹³ is an apocalyptic number.

It is an amenable number.

648693 is a deficient number, since it is larger than the sum of its proper divisors (288321).

648693 is a wasteful number, since it uses less digits than its factorization.

648693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72083 (or 72080 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 648693 is about 805.4147999633. The cubic root of 648693 is about 86.5658113440.

The spelling of 648693 in words is "six hundred forty-eight thousand, six hundred ninety-three".