499999521 has 8 divisors (see below), whose sum is σ = 761904064. Its totient is φ = 285714000.

The previous prime is 499999517. The next prime is 499999543. The reversal of 499999521 is 125999994.

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

It is not a de Polignac number, because 499999521 - 2² = 499999517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (499999021) 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, 11904730 + ... + 11904771.

It is an arithmetic number, because the mean of its divisors is an integer number (95238008).

Almost surely, 2^499999521 is an apocalyptic number.

It is an amenable number.

499999521 is a deficient number, since it is larger than the sum of its proper divisors (261904543).

499999521 is a wasteful number, since it uses less digits than its factorization.

499999521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23809511.

The product of its digits is 2361960, while the sum is 57.

The square root of 499999521 is about 22360.6690642297. The cubic root of 499999521 is about 793.7002725290.

The spelling of 499999521 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred twenty-one".