499984139 has 8 divisors (see below), whose sum is σ = 512477280. Its totient is φ = 487604416.

The previous prime is 499984061. The next prime is 499984171. The reversal of 499984139 is 931489994.

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 499984139 - 2¹² = 499980043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499984039) 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, 19394 + ... + 37095.

It is an arithmetic number, because the mean of its divisors is an integer number (64059660).

Almost surely, 2^499984139 is an apocalyptic number.

499984139 is a deficient number, since it is larger than the sum of its proper divisors (12493141).

499984139 is a wasteful number, since it uses less digits than its factorization.

499984139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56709.

The product of its digits is 2519424, while the sum is 56.

The square root of 499984139 is about 22360.3251094433. The cubic root of 499984139 is about 793.6921333060.

The spelling of 499984139 in words is "four hundred ninety-nine million, nine hundred eighty-four thousand, one hundred thirty-nine".