499957985 has 8 divisors (see below), whose sum is σ = 600422760. Its totient is φ = 399650944.

The previous prime is 499957961. The next prime is 499957993. The reversal of 499957985 is 589759994.

It can be written as a sum of positive squares in 4 ways, for example, as 267944161 + 232013824 = 16369^2 + 15232^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 499957985 - 2²⁴ = 483180769 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32342 + ... + 45231.

It is an arithmetic number, because the mean of its divisors is an integer number (75052845).

Almost surely, 2^499957985 is an apocalyptic number.

It is an amenable number.

499957985 is a deficient number, since it is larger than the sum of its proper divisors (100464775).

499957985 is a wasteful number, since it uses less digits than its factorization.

499957985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78867.

The product of its digits is 36741600, while the sum is 65.

The square root of 499957985 is about 22359.7402713001. The cubic root of 499957985 is about 793.6782938096.

The spelling of 499957985 in words is "four hundred ninety-nine million, nine hundred fifty-seven thousand, nine hundred eighty-five".