501613823 has 2 divisors, whose sum is σ = 501613824. Its totient is φ = 501613822.

The previous prime is 501613799. The next prime is 501613829. The reversal of 501613823 is 328316105.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 501613823 - 2¹² = 501609727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501613829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250806911 + 250806912.

It is an arithmetic number, because the mean of its divisors is an integer number (250806912).

Almost surely, 2^501613823 is an apocalyptic number.

501613823 is a deficient number, since it is larger than the sum of its proper divisors (1).

501613823 is an equidigital number, since it uses as much as digits as its factorization.

501613823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 501613823 is about 22396.7368828586. The cubic root of 501613823 is about 794.5535370114.

Adding to 501613823 its reverse (328316105), we get a palindrome (829929928).

The spelling of 501613823 in words is "five hundred one million, six hundred thirteen thousand, eight hundred twenty-three".