499786321 has 4 divisors (see below), whose sum is σ = 501363252. Its totient is φ = 498209392.

The previous prime is 499786303. The next prime is 499786327. The reversal of 499786321 is 123687994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123687994 = 2 ⋅61843997.

It can be written as a sum of positive squares in 2 ways, for example, as 10890000 + 488896321 = 3300^2 + 22111^2 .

It is a cyclic number.

It is not a de Polignac number, because 499786321 - 2⁵ = 499786289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499786327) 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 3 ways as a sum of consecutive naturals, for example, 787990 + ... + 788623.

It is an arithmetic number, because the mean of its divisors is an integer number (125340813).

Almost surely, 2^499786321 is an apocalyptic number.

It is an amenable number.

499786321 is a deficient number, since it is larger than the sum of its proper divisors (1576931).

499786321 is a wasteful number, since it uses less digits than its factorization.

499786321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576930.

The product of its digits is 653184, while the sum is 49.

The square root of 499786321 is about 22355.9012567152. The cubic root of 499786321 is about 793.5874451174.

The spelling of 499786321 in words is "four hundred ninety-nine million, seven hundred eighty-six thousand, three hundred twenty-one".