501613 has 12 divisors (see below), whose sum is σ = 605340. Its totient is φ = 413952.

The previous prime is 501601. The next prime is 501617. The reversal of 501613 is 316105.

It can be written as a sum of positive squares in 2 ways, for example, as 233289 + 268324 = 483^2 + 518^2 .

It is a de Polignac number, because none of the positive numbers 2^k-501613 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501617) 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 11 ways as a sum of consecutive naturals, for example, 1245 + ... + 1597.

It is an arithmetic number, because the mean of its divisors is an integer number (50445).

2⁵⁰¹⁶¹³ is an apocalyptic number.

It is an amenable number.

501613 is a deficient number, since it is larger than the sum of its proper divisors (103727).

501613 is a wasteful number, since it uses less digits than its factorization.

501613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 501613 is about 708.2464260411. The cubic root of 501613 is about 79.4553102469.

Adding to 501613 its reverse (316105), we get a palindrome (817718).

The spelling of 501613 in words is "five hundred one thousand, six hundred thirteen".