499947 has 24 divisors (see below), whose sum is σ = 820800. Its totient is φ = 269136.

The previous prime is 499943. The next prime is 499957. The reversal of 499947 is 749994.

It is not a de Polignac number, because 499947 - 2² = 499943 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 499899 and 499908.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 499947.

It is not an unprimeable number, because it can be changed into a prime (499943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2704 + ... + 2882.

It is an arithmetic number, because the mean of its divisors is an integer number (34200).

2⁴⁹⁹⁹⁴⁷ is an apocalyptic number.

499947 is a deficient number, since it is larger than the sum of its proper divisors (320853).

499947 is a wasteful number, since it uses less digits than its factorization.

499947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 208 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 499947 is about 707.0693035340. The cubic root of 499947 is about 79.3672480908.

Subtracting 499947 from its reverse (749994), we obtain a cube (250047 = 63³).

The spelling of 499947 in words is "four hundred ninety-nine thousand, nine hundred forty-seven".