648369 has 12 divisors (see below), whose sum is σ = 952692. Its totient is φ = 424800.

The previous prime is 648343. The next prime is 648371. The reversal of 648369 is 963846.

648369 is a `hidden beast` number, since 648 + 3 + 6 + 9 = 666.

648369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 288369 + 360000 = 537^2 + 600^2 .

It is a de Polignac number, because none of the positive numbers 2^k-648369 is a prime.

It is a super-2 number, since 2×648369² = 840764720322, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648369.

It is not an unprimeable number, because it can be changed into a prime (648379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42 + ... + 1139.

It is an arithmetic number, because the mean of its divisors is an integer number (79391).

2⁶⁴⁸³⁶⁹ is an apocalyptic number.

It is an amenable number.

648369 is a deficient number, since it is larger than the sum of its proper divisors (304323).

648369 is a wasteful number, since it uses less digits than its factorization.

648369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248 (or 1245 counting only the distinct ones).

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

The square root of 648369 is about 805.2136362482. The cubic root of 648369 is about 86.5513967217.

The spelling of 648369 in words is "six hundred forty-eight thousand, three hundred sixty-nine".