499855 has 4 divisors (see below), whose sum is σ = 599832. Its totient is φ = 399880.

The previous prime is 499853. The next prime is 499879. The reversal of 499855 is 558994.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 499855 - 2¹ = 499853 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499853) 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, 49981 + ... + 49990.

It is an arithmetic number, because the mean of its divisors is an integer number (149958).

2⁴⁹⁹⁸⁵⁵ is an apocalyptic number.

499855 is a deficient number, since it is larger than the sum of its proper divisors (99977).

499855 is an equidigital number, since it uses as much as digits as its factorization.

499855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99976.

The product of its digits is 64800, while the sum is 40.

The square root of 499855 is about 707.0042432687. The cubic root of 499855 is about 79.3623794182.

The spelling of 499855 in words is "four hundred ninety-nine thousand, eight hundred fifty-five".