499639 has 8 divisors (see below), whose sum is σ = 576288. Its totient is φ = 424320.

The previous prime is 499637. The next prime is 499649. The reversal of 499639 is 936994.

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 499639 - 2¹ = 499637 is a prime.

It is a Duffinian number.

499639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499633) 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, 699 + ... + 1219.

It is an arithmetic number, because the mean of its divisors is an integer number (72036).

2⁴⁹⁹⁶³⁹ is an apocalyptic number.

499639 is a deficient number, since it is larger than the sum of its proper divisors (76649).

499639 is a wasteful number, since it uses less digits than its factorization.

499639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its digits is 52488, while the sum is 40.

The square root of 499639 is about 706.8514695465. The cubic root of 499639 is about 79.3509462734.

The spelling of 499639 in words is "four hundred ninety-nine thousand, six hundred thirty-nine".