505830993 has 8 divisors (see below), whose sum is σ = 687166848. Its totient is φ = 330857904.

The previous prime is 505830991. The next prime is 505831009. The reversal of 505830993 is 399038505.

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

It is not a de Polignac number, because 505830993 - 2¹ = 505830991 is a prime.

It is a super-3 number, since 3×505830993³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (505830991) 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, 1590505 + ... + 1590822.

It is an arithmetic number, because the mean of its divisors is an integer number (85895856).

Almost surely, 2^505830993 is an apocalyptic number.

505830993 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

505830993 is a deficient number, since it is larger than the sum of its proper divisors (181335855).

505830993 is a wasteful number, since it uses less digits than its factorization.

505830993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181383.

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 505830993 is about 22490.6868058759. The cubic root of 505830993 is about 796.7739840334.

The spelling of 505830993 in words is "five hundred five million, eight hundred thirty thousand, nine hundred ninety-three".