499531 has 4 divisors (see below), whose sum is σ = 511192. Its totient is φ = 487872.

The previous prime is 499523. The next prime is 499549. The reversal of 499531 is 135994.

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

It is a cyclic number.

It is not a de Polignac number, because 499531 - 2³ = 499523 is a prime.

It is a super-2 number, since 2×499531² = 499062439922, which contains 22 as substring.

It is a Duffinian number.

499531 is a lucky number.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 499493 and 499502.

It is not an unprimeable number, because it can be changed into a prime (499571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5766 + ... + 5851.

It is an arithmetic number, because the mean of its divisors is an integer number (127798).

2⁴⁹⁹⁵³¹ is an apocalyptic number.

499531 is a deficient number, since it is larger than the sum of its proper divisors (11661).

499531 is a wasteful number, since it uses less digits than its factorization.

499531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11660.

The product of its digits is 4860, while the sum is 31.

The square root of 499531 is about 706.7750703017. The cubic root of 499531 is about 79.3452284653.

Subtracting from 499531 its sum of digits (31), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 499531 in words is "four hundred ninety-nine thousand, five hundred thirty-one".