501768013 has 4 divisors (see below), whose sum is σ = 511235388. Its totient is φ = 492300640.

The previous prime is 501768011. The next prime is 501768031. The reversal of 501768013 is 310867105.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 398481444 + 103286569 = 19962^2 + 10163^2 .

It is a cyclic number.

It is not a de Polignac number, because 501768013 - 2¹ = 501768011 is a prime.

It is a super-2 number, since 2×501768013² = 503542277739936338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501768011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4733608 + ... + 4733713.

It is an arithmetic number, because the mean of its divisors is an integer number (127808847).

Almost surely, 2^501768013 is an apocalyptic number.

501768013 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

501768013 is a deficient number, since it is larger than the sum of its proper divisors (9467375).

501768013 is an equidigital number, since it uses as much as digits as its factorization.

501768013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467374.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 501768013 is about 22400.1788608931. The cubic root of 501768013 is about 794.6349407085.

The spelling of 501768013 in words is "five hundred one million, seven hundred sixty-eight thousand, thirteen".