499321 has 2 divisors, whose sum is σ = 499322. Its totient is φ = 499320.

The previous prime is 499309. The next prime is 499327. The reversal of 499321 is 123994.

It is a happy number.

499321 is nontrivially palindromic in base 8.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384400 + 114921 = 620^2 + 339^2 .

It is a cyclic number.

It is not a de Polignac number, because 499321 - 2¹³ = 491129 is a prime.

It is a super-2 number, since 2×499321² = 498642922082, which contains 22 as substring.

It is an Ulam number.

499321 is an undulating number in base 8.

499321 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 499321.

It is not a weakly prime, because it can be changed into another prime (499327) 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 as a sum of consecutive naturals, namely, 249660 + 249661.

It is an arithmetic number, because the mean of its divisors is an integer number (249661).

2⁴⁹⁹³²¹ is an apocalyptic number.

It is an amenable number.

499321 is a deficient number, since it is larger than the sum of its proper divisors (1).

499321 is an equidigital number, since it uses as much as digits as its factorization.

499321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 499321 is about 706.6264925687. The cubic root of 499321 is about 79.3341081455.

It can be divided in two parts, 499 and 321, that added together give a triangular number (820 = T₄₀).

The spelling of 499321 in words is "four hundred ninety-nine thousand, three hundred twenty-one".