499931 has 4 divisors (see below), whose sum is σ = 517200. Its totient is φ = 482664.

The previous prime is 499927. The next prime is 499943. The reversal of 499931 is 139994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139994 = 2 ⋅69997.

It is a cyclic number.

It is not a de Polignac number, because 499931 - 2² = 499927 is a prime.

It is a super-2 number, since 2×499931² = 499862009522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 499891 and 499900.

It is not an unprimeable number, because it can be changed into a prime (493931) 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 3 ways as a sum of consecutive naturals, for example, 8591 + ... + 8648.

It is an arithmetic number, because the mean of its divisors is an integer number (129300).

2⁴⁹⁹⁹³¹ is an apocalyptic number.

499931 is a deficient number, since it is larger than the sum of its proper divisors (17269).

499931 is a wasteful number, since it uses less digits than its factorization.

499931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17268.

The product of its digits is 8748, while the sum is 35.

The square root of 499931 is about 707.0579891353. The cubic root of 499931 is about 79.3664014080.

It can be divided in two parts, 49993 and 1, that added together give a palindrome (49994).

The spelling of 499931 in words is "four hundred ninety-nine thousand, nine hundred thirty-one".