499643 has 4 divisors (see below), whose sum is σ = 525960. Its totient is φ = 473328.

The previous prime is 499637. The next prime is 499649. The reversal of 499643 is 346994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346994 = 2 ⋅173497.

It is an interprime number because it is at equal distance from previous prime (499637) and next prime (499649).

It is not a de Polignac number, because 499643 - 2¹⁶ = 434107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13130 + ... + 13167.

It is an arithmetic number, because the mean of its divisors is an integer number (131490).

2⁴⁹⁹⁶⁴³ is an apocalyptic number.

499643 is a deficient number, since it is larger than the sum of its proper divisors (26317).

499643 is a wasteful number, since it uses less digits than its factorization.

499643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26316.

The product of its digits is 23328, while the sum is 35.

The square root of 499643 is about 706.8542989895. The cubic root of 499643 is about 79.3511580283.

The spelling of 499643 in words is "four hundred ninety-nine thousand, six hundred forty-three".