506903813 has 8 divisors (see below), whose sum is σ = 547644888. Its totient is φ = 466412544.

The previous prime is 506903809. The next prime is 506903827. The reversal of 506903813 is 318309605.

It can be written as a sum of positive squares in 4 ways, for example, as 68644 + 506835169 = 262^2 + 22513^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 506903813 - 2² = 506903809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506909813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58220 + ... + 66357.

It is an arithmetic number, because the mean of its divisors is an integer number (68455611).

Almost surely, 2^506903813 is an apocalyptic number.

It is an amenable number.

506903813 is a deficient number, since it is larger than the sum of its proper divisors (40741075).

506903813 is a wasteful number, since it uses less digits than its factorization.

506903813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124903.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 506903813 is about 22514.5244897599. The cubic root of 506903813 is about 797.3368805180.

The spelling of 506903813 in words is "five hundred six million, nine hundred three thousand, eight hundred thirteen".