508649 has 6 divisors (see below), whose sum is σ = 537210. Its totient is φ = 481536.

The previous prime is 508643. The next prime is 508661. The reversal of 508649 is 946805.

It can be written as a sum of positive squares in only one way, i.e., 283024 + 225625 = 532^2 + 475^2 .

It is not a de Polignac number, because 508649 - 2⁸ = 508393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (508643) 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 5 ways as a sum of consecutive naturals, for example, 344 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (89535).

2⁵⁰⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

508649 is a deficient number, since it is larger than the sum of its proper divisors (28561).

508649 is a wasteful number, since it uses less digits than its factorization.

508649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 508649 is about 713.1963264067. The cubic root of 508649 is about 79.8250865950.

The spelling of 508649 in words is "five hundred eight thousand, six hundred forty-nine".